diff --git a/docs/design/466-permission-deny-priority/README.md b/docs/design/466-permission-deny-priority/README.md
new file mode 100644
index 0000000..1520638
--- /dev/null
+++ b/docs/design/466-permission-deny-priority/README.md
@@ -0,0 +1,30 @@
+# 설계서: 역할/권한 모델에 deny, 우선순위, 충돌 해소 규칙 추가 (#466)
+
+> **상태**: Approved
+> **작성**: [AI] Architect · **최종수정**: 2026-06-25
+> **추적성** — Redmine: #466 · 관련 ADR: 없음
+> · 구현 파일: `cb_permission.permission_effect`, `PermissionService`, `PermissionMapper`, `cb_agent_doc_vpd_filter` · 테스트: SQLcl `27`, `mvn test`
+
+## 1. 목적
+
+역할이 여러 개 붙은 사용자에게 allow 권한과 deny 권한이 동시에 존재할 때 최종 접근 범위를 명확히 계산한다.
+
+## 2. 범위
+
+- 포함: permission 단위 `ALLOW/DENY` 효과 추가, deny 우선 VPD predicate 생성, UI 저장/목록 표시, 테스트.
+- 제외: role 자체 우선순위 숫자, 승인 workflow, rule별 deny.
+
+## 3. 인수조건
+
+- [ ] `cb_permission.permission_effect`가 `ALLOW` 기본값으로 추가된다.
+- [ ] deny permission은 같은 object/action의 allow 결과에서 제외된다.
+- [ ] deny `ALL`이 있으면 최종 결과는 `1 = 0`이다.
+- [ ] allow가 없으면 deny가 있어도 `1 = 0`이다.
+- [ ] UI에서 권한 효과를 선택하고 목록에서 확인할 수 있다.
+
+## 4. 설계 결정
+
+- 효과는 `cb_permission` 단위로 둔다. 하나의 permission set이 allow인지 deny인지 명확히 구분한다.
+- 최종 predicate는 `(<allow predicate>) AND NOT (<deny predicate>)`이다.
+- allow `ALL`은 `1 = 1`, deny `ALL`은 즉시 `1 = 0`이다.
+- deny만 있고 allow가 없으면 whitelist 기본값에 따라 `1 = 0`이다.
diff --git a/sql/adb/17_agent_ords_security_local_vpd_setup.sql b/sql/adb/17_agent_ords_security_local_vpd_setup.sql
index 5179d58..b3c0f95 100644
--- a/sql/adb/17_agent_ords_security_local_vpd_setup.sql
+++ b/sql/adb/17_agent_ords_security_local_vpd_setup.sql
@@ -65,7 +65,8 @@ CREATE TABLE cb_permission (
   perm_id      NUMBER PRIMARY KEY,
   role_id      NUMBER NOT NULL REFERENCES cb_app_role(role_id),
   target_name  VARCHAR2(128) NOT NULL,
-  action_name  VARCHAR2(30)  NOT NULL
+  action_name  VARCHAR2(30)  NOT NULL,
+  permission_effect VARCHAR2(10) DEFAULT 'ALLOW' NOT NULL
 );
 
 CREATE TABLE cb_permission_rule (
@@ -106,9 +107,9 @@ INSERT INTO cb_user_role VALUES (101, 10);
 INSERT INTO cb_user_role VALUES (102, 20);
 INSERT INTO cb_user_role VALUES (103, 30);
 
-INSERT INTO cb_permission VALUES (100, 10, 'CB_V_SEARCH_DOCUMENTS', 'SELECT');
-INSERT INTO cb_permission VALUES (200, 20, 'CB_V_SEARCH_DOCUMENTS', 'SELECT');
-INSERT INTO cb_permission VALUES (300, 30, 'CB_V_SEARCH_DOCUMENTS', 'SELECT');
+INSERT INTO cb_permission VALUES (100, 10, 'CB_V_SEARCH_DOCUMENTS', 'SELECT', 'ALLOW');
+INSERT INTO cb_permission VALUES (200, 20, 'CB_V_SEARCH_DOCUMENTS', 'SELECT', 'ALLOW');
+INSERT INTO cb_permission VALUES (300, 30, 'CB_V_SEARCH_DOCUMENTS', 'SELECT', 'ALLOW');
 
 INSERT INTO cb_permission_rule VALUES (1000, 100, 'MY_DEPT', NULL);
 INSERT INTO cb_permission_rule VALUES (2000, 200, 'SELF',    NULL);
@@ -256,7 +257,8 @@ AUTHID DEFINER
 AS
   v_user_id    NUMBER;
   v_target     VARCHAR2(128);
-  v_predicate  VARCHAR2(32767);
+  v_allow_predicate VARCHAR2(32767);
+  v_deny_predicate  VARCHAR2(32767);
 
   FUNCTION quote_literal(p_value IN VARCHAR2) RETURN VARCHAR2 IS
   BEGIN
@@ -294,16 +296,22 @@ AS
       RETURN NULL;
   END;
 
-  PROCEDURE append_or(p_clause IN VARCHAR2) IS
+  PROCEDURE append_or(p_effect IN VARCHAR2, p_clause IN VARCHAR2) IS
   BEGIN
     IF p_clause IS NULL THEN
       RETURN;
     END IF;
 
-    IF v_predicate IS NULL THEN
-      v_predicate := '(' || p_clause || ')';
+    IF p_effect = 'DENY' THEN
+      IF v_deny_predicate IS NULL THEN
+        v_deny_predicate := '(' || p_clause || ')';
+      ELSE
+        v_deny_predicate := v_deny_predicate || ' OR (' || p_clause || ')';
+      END IF;
+    ELSIF v_allow_predicate IS NULL THEN
+      v_allow_predicate := '(' || p_clause || ')';
     ELSE
-      v_predicate := v_predicate || ' OR (' || p_clause || ')';
+      v_allow_predicate := v_allow_predicate || ' OR (' || p_clause || ')';
     END IF;
   END;
 BEGIN
@@ -323,6 +331,7 @@ BEGIN
   FOR r IN (
     SELECT UPPER(TRIM(r.rule_type)) AS rule_type,
            UPPER(TRIM(r.rule_column)) AS rule_column,
+           NVL(UPPER(TRIM(p.permission_effect)), 'ALLOW') AS permission_effect,
            r.rule_value
     FROM   cb_user_role ur
     JOIN   cb_permission p
@@ -338,46 +347,56 @@ BEGIN
       v_column VARCHAR2(128);
     BEGIN
       IF r.rule_type = 'ALL' THEN
-        RETURN '1 = 1';
+        IF r.permission_effect = 'DENY' THEN
+          RETURN '1 = 0';
+        END IF;
+        v_allow_predicate := '(1 = 1)';
       ELSIF r.rule_type = 'MY_DEPT' THEN
         v_column := safe_column(p_schema, p_object, NVL(r.rule_column, 'DEPT_CODE'));
         IF v_column IS NOT NULL THEN
-          append_or(v_column || ' = SYS_CONTEXT(''CB_AGENT_CTX'', ''DEPT_CODE'')');
+          append_or(r.permission_effect, v_column || ' = SYS_CONTEXT(''CB_AGENT_CTX'', ''DEPT_CODE'')');
         END IF;
       ELSIF r.rule_type = 'SELF' THEN
         v_column := safe_column(p_schema, p_object, NVL(r.rule_column, 'OWNER_EMP_NO'));
         IF v_column IS NOT NULL THEN
-          append_or(v_column || ' = SYS_CONTEXT(''CB_AGENT_CTX'', ''EMP_NO'')');
+          append_or(r.permission_effect, v_column || ' = SYS_CONTEXT(''CB_AGENT_CTX'', ''EMP_NO'')');
         END IF;
       ELSIF r.rule_type = 'DEPT' THEN
         v_column := safe_column(p_schema, p_object, NVL(r.rule_column, 'DEPT_CODE'));
         IF v_column IS NOT NULL THEN
-          append_or(v_column || ' = ' || quote_literal(r.rule_value));
+          append_or(r.permission_effect, v_column || ' = ' || quote_literal(r.rule_value));
         END IF;
       ELSIF r.rule_type = 'EMP_NO' THEN
         v_column := safe_column(p_schema, p_object, NVL(r.rule_column, 'OWNER_EMP_NO'));
         IF v_column IS NOT NULL THEN
-          append_or(v_column || ' = ' || quote_literal(r.rule_value));
+          append_or(r.permission_effect, v_column || ' = ' || quote_literal(r.rule_value));
         END IF;
       ELSIF r.rule_type = '=' THEN
         v_column := safe_column(p_schema, p_object, r.rule_column);
         IF v_column IS NOT NULL THEN
-          append_or('TO_CHAR(' || v_column || ') = ' || quote_literal(r.rule_value));
+          append_or(r.permission_effect, 'TO_CHAR(' || v_column || ') = ' || quote_literal(r.rule_value));
         END IF;
       ELSIF r.rule_type IN ('!=', '<>') THEN
         v_column := safe_column(p_schema, p_object, r.rule_column);
         IF v_column IS NOT NULL THEN
-          append_or('TO_CHAR(' || v_column || ') <> ' || quote_literal(r.rule_value));
+          append_or(r.permission_effect, 'TO_CHAR(' || v_column || ') <> ' || quote_literal(r.rule_value));
         END IF;
       END IF;
     END;
   END LOOP;
 
-  IF v_predicate IS NULL THEN
+  IF v_allow_predicate IS NULL THEN
     RETURN '1 = 0';
   END IF;
 
-  RETURN '(' || v_predicate || ')';
+  IF v_deny_predicate IS NULL THEN
+    IF v_allow_predicate = '(1 = 1)' THEN
+      RETURN '1 = 1';
+    END IF;
+    RETURN '(' || v_allow_predicate || ')';
+  END IF;
+
+  RETURN '((' || v_allow_predicate || ') AND NOT (' || v_deny_predicate || '))';
 END;
 /
 
diff --git a/sql/adb/25_agent_ords_security_backoffice_support.sql b/sql/adb/25_agent_ords_security_backoffice_support.sql
index 811686a..feab13f 100644
--- a/sql/adb/25_agent_ords_security_backoffice_support.sql
+++ b/sql/adb/25_agent_ords_security_backoffice_support.sql
@@ -52,6 +52,16 @@ EXCEPTION
 END;
 /
 
+BEGIN
+  EXECUTE IMMEDIATE 'ALTER TABLE cb_permission ADD (permission_effect VARCHAR2(10) DEFAULT ''ALLOW'' NOT NULL)';
+EXCEPTION
+  WHEN OTHERS THEN
+    IF SQLCODE != -1430 THEN
+      RAISE;
+    END IF;
+END;
+/
+
 CREATE TABLE cb_protected_object (
   object_id    NUMBER PRIMARY KEY,
   owner        VARCHAR2(128) NOT NULL,
diff --git a/sql/adb/26_agent_ords_security_dynamic_vpd_filter.sql b/sql/adb/26_agent_ords_security_dynamic_vpd_filter.sql
index fc35bff..1db0fce 100644
--- a/sql/adb/26_agent_ords_security_dynamic_vpd_filter.sql
+++ b/sql/adb/26_agent_ords_security_dynamic_vpd_filter.sql
@@ -22,7 +22,8 @@ AS
   -- no matched stored row rule means no rows are visible.
   v_user_id    NUMBER;
   v_target     VARCHAR2(128);
-  v_predicate  VARCHAR2(32767);
+  v_allow_predicate VARCHAR2(32767);
+  v_deny_predicate  VARCHAR2(32767);
 
   FUNCTION quote_literal(p_value IN VARCHAR2) RETURN VARCHAR2 IS
   BEGIN
@@ -60,16 +61,22 @@ AS
       RETURN NULL;
   END;
 
-  PROCEDURE append_or(p_clause IN VARCHAR2) IS
+  PROCEDURE append_or(p_effect IN VARCHAR2, p_clause IN VARCHAR2) IS
   BEGIN
     IF p_clause IS NULL THEN
       RETURN;
     END IF;
 
-    IF v_predicate IS NULL THEN
-      v_predicate := '(' || p_clause || ')';
+    IF p_effect = 'DENY' THEN
+      IF v_deny_predicate IS NULL THEN
+        v_deny_predicate := '(' || p_clause || ')';
+      ELSE
+        v_deny_predicate := v_deny_predicate || ' OR (' || p_clause || ')';
+      END IF;
+    ELSIF v_allow_predicate IS NULL THEN
+      v_allow_predicate := '(' || p_clause || ')';
     ELSE
-      v_predicate := v_predicate || ' OR (' || p_clause || ')';
+      v_allow_predicate := v_allow_predicate || ' OR (' || p_clause || ')';
     END IF;
   END;
 BEGIN
@@ -89,6 +96,7 @@ BEGIN
   FOR r IN (
     SELECT UPPER(TRIM(r.rule_type)) AS rule_type,
            UPPER(TRIM(r.rule_column)) AS rule_column,
+           NVL(UPPER(TRIM(p.permission_effect)), 'ALLOW') AS permission_effect,
            r.rule_value
     FROM   cb_user_role ur
     JOIN   cb_permission p
@@ -104,48 +112,58 @@ BEGIN
       v_column VARCHAR2(128);
     BEGIN
       IF r.rule_type = 'ALL' THEN
-        RETURN '1 = 1';
+        IF r.permission_effect = 'DENY' THEN
+          RETURN '1 = 0';
+        END IF;
+        v_allow_predicate := '(1 = 1)';
       ELSIF r.rule_type = 'MY_DEPT' THEN
         -- NULL rule_column keeps backward compatibility with the demo seed.
         v_column := safe_column(p_schema, p_object, NVL(r.rule_column, 'DEPT_CODE'));
         IF v_column IS NOT NULL THEN
-          append_or(v_column || ' = SYS_CONTEXT(''CB_AGENT_CTX'', ''DEPT_CODE'')');
+          append_or(r.permission_effect, v_column || ' = SYS_CONTEXT(''CB_AGENT_CTX'', ''DEPT_CODE'')');
         END IF;
       ELSIF r.rule_type = 'SELF' THEN
         -- NULL rule_column keeps backward compatibility with the demo seed.
         v_column := safe_column(p_schema, p_object, NVL(r.rule_column, 'OWNER_EMP_NO'));
         IF v_column IS NOT NULL THEN
-          append_or(v_column || ' = SYS_CONTEXT(''CB_AGENT_CTX'', ''EMP_NO'')');
+          append_or(r.permission_effect, v_column || ' = SYS_CONTEXT(''CB_AGENT_CTX'', ''EMP_NO'')');
         END IF;
       ELSIF r.rule_type = 'DEPT' THEN
         v_column := safe_column(p_schema, p_object, NVL(r.rule_column, 'DEPT_CODE'));
         IF v_column IS NOT NULL THEN
-          append_or(v_column || ' = ' || quote_literal(r.rule_value));
+          append_or(r.permission_effect, v_column || ' = ' || quote_literal(r.rule_value));
         END IF;
       ELSIF r.rule_type = 'EMP_NO' THEN
         v_column := safe_column(p_schema, p_object, NVL(r.rule_column, 'OWNER_EMP_NO'));
         IF v_column IS NOT NULL THEN
-          append_or(v_column || ' = ' || quote_literal(r.rule_value));
+          append_or(r.permission_effect, v_column || ' = ' || quote_literal(r.rule_value));
         END IF;
       ELSIF r.rule_type = '=' THEN
         v_column := safe_column(p_schema, p_object, r.rule_column);
         IF v_column IS NOT NULL THEN
-          append_or('TO_CHAR(' || v_column || ') = ' || quote_literal(r.rule_value));
+          append_or(r.permission_effect, 'TO_CHAR(' || v_column || ') = ' || quote_literal(r.rule_value));
         END IF;
       ELSIF r.rule_type IN ('!=', '<>') THEN
         v_column := safe_column(p_schema, p_object, r.rule_column);
         IF v_column IS NOT NULL THEN
-          append_or('TO_CHAR(' || v_column || ') <> ' || quote_literal(r.rule_value));
+          append_or(r.permission_effect, 'TO_CHAR(' || v_column || ') <> ' || quote_literal(r.rule_value));
         END IF;
       END IF;
     END;
   END LOOP;
 
-  IF v_predicate IS NULL THEN
+  IF v_allow_predicate IS NULL THEN
     RETURN '1 = 0';
   END IF;
 
-  RETURN '(' || v_predicate || ')';
+  IF v_deny_predicate IS NULL THEN
+    IF v_allow_predicate = '(1 = 1)' THEN
+      RETURN '1 = 1';
+    END IF;
+    RETURN '(' || v_allow_predicate || ')';
+  END IF;
+
+  RETURN '((' || v_allow_predicate || ') AND NOT (' || v_deny_predicate || '))';
 END;
 /
 
diff --git a/sql/adb/27_agent_ords_security_dynamic_vpd_filter_test.sql b/sql/adb/27_agent_ords_security_dynamic_vpd_filter_test.sql
index 87cd7f0..7591474 100644
--- a/sql/adb/27_agent_ords_security_dynamic_vpd_filter_test.sql
+++ b/sql/adb/27_agent_ords_security_dynamic_vpd_filter_test.sql
@@ -61,6 +61,12 @@ BEGIN
   INSERT INTO cb_app_user(user_id, user_name, employee_no, dept_code, can_read_contents, active)
   VALUES (456110, 'rule_test_target_mismatch', 'E456110', 'QA', 'N', 'Y');
 
+  INSERT INTO cb_app_user(user_id, user_name, employee_no, dept_code, can_read_contents, active)
+  VALUES (456111, 'rule_test_allow_deny', 'E456111', 'HR', 'N', 'Y');
+
+  INSERT INTO cb_app_user(user_id, user_name, employee_no, dept_code, can_read_contents, active)
+  VALUES (456112, 'rule_test_deny_only', 'E456112', 'HR', 'N', 'Y');
+
   INSERT INTO cb_app_role(role_id, role_name) VALUES (456101, 'RULE_TEST_MY_DEPT');
   INSERT INTO cb_app_role(role_id, role_name) VALUES (456102, 'RULE_TEST_SELF');
   INSERT INTO cb_app_role(role_id, role_name) VALUES (456103, 'RULE_TEST_ALL');
@@ -71,6 +77,8 @@ BEGIN
   INSERT INTO cb_app_role(role_id, role_name) VALUES (456108, 'RULE_TEST_OR_INJECTION');
   INSERT INTO cb_app_role(role_id, role_name) VALUES (456109, 'RULE_TEST_COLUMN_INJECTION');
   INSERT INTO cb_app_role(role_id, role_name) VALUES (456110, 'RULE_TEST_TARGET_MISMATCH');
+  INSERT INTO cb_app_role(role_id, role_name) VALUES (456111, 'RULE_TEST_ALLOW_DENY');
+  INSERT INTO cb_app_role(role_id, role_name) VALUES (456112, 'RULE_TEST_DENY_ONLY');
 
   INSERT INTO cb_user_role(user_id, role_id) VALUES (456101, 456101);
   INSERT INTO cb_user_role(user_id, role_id) VALUES (456102, 456102);
@@ -82,6 +90,8 @@ BEGIN
   INSERT INTO cb_user_role(user_id, role_id) VALUES (456108, 456108);
   INSERT INTO cb_user_role(user_id, role_id) VALUES (456109, 456109);
   INSERT INTO cb_user_role(user_id, role_id) VALUES (456110, 456110);
+  INSERT INTO cb_user_role(user_id, role_id) VALUES (456111, 456111);
+  INSERT INTO cb_user_role(user_id, role_id) VALUES (456112, 456112);
 
   INSERT INTO cb_permission(perm_id, role_id, target_name, action_name)
   VALUES (456101, 456101, 'CB_V_SEARCH_DOCUMENTS', 'SELECT');
@@ -113,6 +123,15 @@ BEGIN
   INSERT INTO cb_permission(perm_id, role_id, target_name, action_name)
   VALUES (456110, 456110, 'BOARD_POSTS', 'SELECT');
 
+  INSERT INTO cb_permission(perm_id, role_id, target_name, action_name, permission_effect)
+  VALUES (456111, 456111, 'CB_V_SEARCH_DOCUMENTS', 'SELECT', 'ALLOW');
+
+  INSERT INTO cb_permission(perm_id, role_id, target_name, action_name, permission_effect)
+  VALUES (456112, 456111, 'CB_V_SEARCH_DOCUMENTS', 'SELECT', 'DENY');
+
+  INSERT INTO cb_permission(perm_id, role_id, target_name, action_name, permission_effect)
+  VALUES (456113, 456112, 'CB_V_SEARCH_DOCUMENTS', 'SELECT', 'DENY');
+
   INSERT INTO cb_permission_rule(rule_id, perm_id, rule_column, rule_type, rule_value)
   VALUES (456101, 456101, NULL, 'MY_DEPT', NULL);
 
@@ -143,6 +162,15 @@ BEGIN
   INSERT INTO cb_permission_rule(rule_id, perm_id, rule_column, rule_type, rule_value)
   VALUES (456110, 456110, NULL, 'ALL', NULL);
 
+  INSERT INTO cb_permission_rule(rule_id, perm_id, rule_column, rule_type, rule_value)
+  VALUES (456111, 456111, NULL, 'ALL', NULL);
+
+  INSERT INTO cb_permission_rule(rule_id, perm_id, rule_column, rule_type, rule_value)
+  VALUES (456112, 456112, 'DEPT_CODE', '=', 'HR');
+
+  INSERT INTO cb_permission_rule(rule_id, perm_id, rule_column, rule_type, rule_value)
+  VALUES (456113, 456113, 'DEPT_CODE', '=', 'HR');
+
   COMMIT;
 END;
 /
@@ -229,6 +257,9 @@ BEGIN
   assert_equals('COLUMN_INJECTION_DENIES', 456109, '1 = 0');
   assert_equals_for_object('TARGET_MISMATCH_DENIES', 456110, 'CB_V_SEARCH_DOCUMENTS', '1 = 0');
   assert_equals_for_object('TARGET_MATCH_ALL_ALLOWS', 456110, 'BOARD_POSTS', '1 = 1');
+  assert_contains('ALLOW_ALL_MINUS_DENY_DEPT', 456111, 'AND NOT');
+  assert_contains('ALLOW_ALL_MINUS_DENY_DEPT_DETAIL', 456111, 'TO_CHAR(DEPT_CODE) = ''HR''');
+  assert_equals('DENY_ONLY_DENIES', 456112, '1 = 0');
   cb_agent_ctx_pkg.clear_user;
 END;
 /
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionSet.java b/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionSet.java
index e42812d..ebaa5b7 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionSet.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionSet.java
@@ -7,6 +7,7 @@ public record PermissionSet(
     long roleId,
     long objectId,
     String action,
+    String permissionEffect,
     List<PermissionRule> rules,
     List<String> visibleColumns
 ) {
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionSetCommand.java b/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionSetCommand.java
index cc338cb..831146c 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionSetCommand.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionSetCommand.java
@@ -9,6 +9,7 @@ public record PermissionSetCommand(
     @Positive long roleId,
     @Positive long objectId,
     @NotBlank String action,
+    String permissionEffect,
     @NotEmpty List<RuleCommand> rules,
     List<String> visibleColumns
 ) {
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionView.java b/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionView.java
index d100e98..795b5f0 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionView.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/domain/permission/PermissionView.java
@@ -7,6 +7,7 @@ public record PermissionView(
     long objectId,
     String objectName,
     String action,
+    String permissionEffect,
     String rules,
     String visibleColumns,
     String filterPreview,
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/mapper/PermissionMapper.java b/src/main/java/com/cloudhandson/vpdbackoffice/mapper/PermissionMapper.java
index 1428a88..63871c4 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/mapper/PermissionMapper.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/mapper/PermissionMapper.java
@@ -36,10 +36,14 @@ public interface PermissionMapper {
   void insertPermission(@Param("permissionId") long permissionId,
                         @Param("roleId") long roleId,
                         @Param("objectId") long objectId,
-                        @Param("action") String action);
+                        @Param("action") String action,
+                        @Param("permissionEffect") String permissionEffect);
 
   void updatePermissionAction(@Param("permissionId") long permissionId, @Param("action") String action);
 
+  void updatePermissionEffect(@Param("permissionId") long permissionId,
+                              @Param("permissionEffect") String permissionEffect);
+
   void deleteRules(@Param("permissionId") long permissionId);
 
   void insertRule(PermissionRule rule);
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/service/BackofficeSchemaService.java b/src/main/java/com/cloudhandson/vpdbackoffice/service/BackofficeSchemaService.java
index 49be87e..fa492f2 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/service/BackofficeSchemaService.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/service/BackofficeSchemaService.java
@@ -56,9 +56,12 @@ public class BackofficeSchemaService {
           perm_id      NUMBER PRIMARY KEY,
           role_id      NUMBER NOT NULL,
           target_name  VARCHAR2(128) NOT NULL,
-          action_name  VARCHAR2(30) DEFAULT 'SELECT' NOT NULL
+          action_name  VARCHAR2(30) DEFAULT 'SELECT' NOT NULL,
+          permission_effect VARCHAR2(10) DEFAULT 'ALLOW' NOT NULL
         )
         """);
+    addColumn(results, "cb_permission", "permission_effect",
+        "ALTER TABLE cb_permission ADD (permission_effect VARCHAR2(10) DEFAULT 'ALLOW' NOT NULL)");
     createTable(results, "cb_permission_rule", """
         CREATE TABLE cb_permission_rule (
           rule_id      NUMBER PRIMARY KEY,
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/service/PermissionService.java b/src/main/java/com/cloudhandson/vpdbackoffice/service/PermissionService.java
index 7ffda54..9014649 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/service/PermissionService.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/service/PermissionService.java
@@ -22,6 +22,7 @@ public class PermissionService {
   private static final Set<String> RULE_TYPES = Set.of("ALL", "=", "!=", "MY_DEPT", "SELF", "DEPT", "EMP_NO");
   private static final Set<String> VALUE_REQUIRED_RULE_TYPES = Set.of("=", "!=", "DEPT", "EMP_NO");
   private static final Set<String> DEFAULT_COLUMN_RULE_TYPES = Set.of("MY_DEPT", "SELF", "DEPT", "EMP_NO");
+  private static final Set<String> PERMISSION_EFFECTS = Set.of("ALLOW", "DENY");
 
   private final PermissionMapper permissionMapper;
   private final ProtectedObjectService protectedObjectService;
@@ -69,6 +70,7 @@ public class PermissionService {
     if (!"SELECT".equalsIgnoreCase(command.action())) {
       throw new AppException("초기 구현에서는 SELECT 권한만 저장할 수 있습니다.");
     }
+    String permissionEffect = normalizePermissionEffect(command.permissionEffect());
     AppRole role = permissionMapper.findRole(command.roleId());
     if (role == null) {
       throw new AppException("역할을 찾을 수 없습니다.");
@@ -80,9 +82,10 @@ public class PermissionService {
     Long existingId = permissionMapper.findPermissionId(command.roleId(), command.objectId());
     long permissionId = existingId == null ? permissionMapper.nextPermissionId() : existingId;
     if (existingId == null) {
-      permissionMapper.insertPermission(permissionId, command.roleId(), command.objectId(), "SELECT");
+      permissionMapper.insertPermission(permissionId, command.roleId(), command.objectId(), "SELECT", permissionEffect);
     } else {
       permissionMapper.updatePermissionAction(permissionId, "SELECT");
+      permissionMapper.updatePermissionEffect(permissionId, permissionEffect);
     }
 
     permissionMapper.deleteRules(permissionId);
@@ -107,7 +110,7 @@ public class PermissionService {
         "PERMISSION_SAVED", null, command.objectId(), "SUCCESS", null, null,
         "roleId=" + command.roleId()
     ));
-    return new PermissionSet(permissionId, command.roleId(), command.objectId(), "SELECT", List.of(), List.of());
+    return new PermissionSet(permissionId, command.roleId(), command.objectId(), "SELECT", permissionEffect, List.of(), List.of());
   }
 
   @Transactional
@@ -185,6 +188,14 @@ public class PermissionService {
     return clean(value).toUpperCase(Locale.ROOT);
   }
 
+  private String normalizePermissionEffect(String value) {
+    String effect = clean(value).isBlank() ? "ALLOW" : normalize(value);
+    if (!PERMISSION_EFFECTS.contains(effect)) {
+      throw new AppException("허용되지 않은 권한 효과입니다: " + effect);
+    }
+    return effect;
+  }
+
   private String normalizeNullable(String value) {
     String cleaned = clean(value);
     return cleaned.isBlank() ? null : cleaned.toUpperCase(Locale.ROOT);
diff --git a/src/main/java/com/cloudhandson/vpdbackoffice/web/PermissionController.java b/src/main/java/com/cloudhandson/vpdbackoffice/web/PermissionController.java
index 42f8ba6..10c3bb5 100644
--- a/src/main/java/com/cloudhandson/vpdbackoffice/web/PermissionController.java
+++ b/src/main/java/com/cloudhandson/vpdbackoffice/web/PermissionController.java
@@ -102,6 +102,7 @@ public class PermissionController {
   public String save(
       @RequestParam long roleId,
       @RequestParam String objectRef,
+      @RequestParam(defaultValue = "ALLOW") String permissionEffect,
       @RequestParam(required = false) List<String> ruleColumn,
       @RequestParam List<String> ruleType,
       @RequestParam(required = false) List<String> ruleValue,
@@ -113,6 +114,7 @@ public class PermissionController {
         roleId,
         objectId,
         "SELECT",
+        permissionEffect,
         buildRules(ruleColumn, ruleType, ruleValue),
         splitColumns(visibleColumns)
     ));
diff --git a/src/main/resources/mapper/PermissionMapper.xml b/src/main/resources/mapper/PermissionMapper.xml
index 2ce05d6..d31eaf8 100644
--- a/src/main/resources/mapper/PermissionMapper.xml
+++ b/src/main/resources/mapper/PermissionMapper.xml
@@ -35,6 +35,7 @@
            o.object_id,
            p.target_name AS object_name,
            p.action_name AS action,
+           NVL(p.permission_effect, 'ALLOW') AS permission_effect,
            LISTAGG(
              NVL2(pr.rule_column, pr.rule_column || ' ', '') ||
              pr.rule_type ||
@@ -74,7 +75,7 @@
     JOIN cb_app_role r ON r.role_id = p.role_id
     LEFT JOIN cb_protected_object o ON o.object_name = p.target_name
     LEFT JOIN cb_permission_rule pr ON pr.perm_id = p.perm_id
-    GROUP BY p.perm_id, r.role_id, r.role_name, o.object_id, p.target_name, p.action_name
+    GROUP BY p.perm_id, r.role_id, r.role_name, o.object_id, p.target_name, p.action_name, p.permission_effect
     ORDER BY r.role_name, p.target_name
   </select>
 
@@ -104,7 +105,8 @@
     SELECT p.perm_id AS permission_id,
            p.role_id,
            o.object_id,
-           p.action_name AS action
+           p.action_name AS action,
+           NVL(p.permission_effect, 'ALLOW') AS permission_effect
     FROM cb_permission p
     JOIN cb_protected_object o ON o.object_name = p.target_name
     WHERE p.role_id = #{roleId}
@@ -120,8 +122,8 @@
   </select>
 
   <insert id="insertPermission">
-    INSERT INTO cb_permission (perm_id, role_id, target_name, action_name)
-    SELECT #{permissionId}, #{roleId}, object_name, #{action}
+    INSERT INTO cb_permission (perm_id, role_id, target_name, action_name, permission_effect)
+    SELECT #{permissionId}, #{roleId}, object_name, #{action}, #{permissionEffect}
     FROM cb_protected_object
     WHERE object_id = #{objectId}
   </insert>
@@ -132,6 +134,12 @@
     WHERE perm_id = #{permissionId}
   </update>
 
+  <update id="updatePermissionEffect">
+    UPDATE cb_permission
+    SET permission_effect = #{permissionEffect}
+    WHERE perm_id = #{permissionId}
+  </update>
+
   <delete id="deleteRules">
     DELETE FROM cb_permission_rule
     WHERE perm_id = #{permissionId}
diff --git a/src/main/resources/templates/permissions.html b/src/main/resources/templates/permissions.html
index cd048e7..d42995d 100644
--- a/src/main/resources/templates/permissions.html
+++ b/src/main/resources/templates/permissions.html
@@ -37,6 +37,13 @@
           </optgroup>
         </select>
       </label>
+      <label>
+        권한 효과
+        <select class="form-select" name="permissionEffect" required>
+          <option value="ALLOW">허용</option>
+          <option value="DENY">거부</option>
+        </select>
+      </label>
       <div class="span-2">
         <div class="field-block-title">행 규칙</div>
         <div id="rowRuleList" class="rule-list">
@@ -80,6 +87,7 @@
           <th>역할</th>
           <th>테이블/뷰</th>
           <th>Action</th>
+          <th>Effect</th>
           <th>행 규칙</th>
           <th>적용 필터</th>
           <th>NULL 제외 컬럼</th>
@@ -92,6 +100,11 @@
           <td th:text="${permission.roleName()}">HR_DEPT_ROLE</td>
           <td th:text="${permission.objectName()}">CB_V_SEARCH_DOCUMENTS</td>
           <td th:text="${permission.action()}">SELECT</td>
+          <td>
+            <span class="badge"
+                  th:classappend="${permission.permissionEffect() == 'DENY'} ? ' text-bg-danger' : ' text-bg-success'"
+                  th:text="${permission.permissionEffect()}">ALLOW</span>
+          </td>
           <td th:text="${permission.rules()} ?: '-'">ALL</td>
           <td><pre class="table-pre" th:text="${permission.filterPreview()} ?: '-'">ALL ROWS</pre></td>
           <td th:text="${permission.visibleColumns()} ?: '-'">CONTENTS</td>
@@ -104,7 +117,7 @@
           </td>
         </tr>
         <tr th:if="${#lists.isEmpty(permissions)}">
-          <td colspan="8" class="text-muted">등록된 권한이 없습니다.</td>
+          <td colspan="9" class="text-muted">등록된 권한이 없습니다.</td>
         </tr>
         </tbody>
       </table>
diff --git a/src/test/java/com/cloudhandson/vpdbackoffice/service/PermissionServiceTest.java b/src/test/java/com/cloudhandson/vpdbackoffice/service/PermissionServiceTest.java
index 3249a24..ac195fd 100644
--- a/src/test/java/com/cloudhandson/vpdbackoffice/service/PermissionServiceTest.java
+++ b/src/test/java/com/cloudhandson/vpdbackoffice/service/PermissionServiceTest.java
@@ -52,6 +52,7 @@ class PermissionServiceTest {
         10L,
         1L,
         "SELECT",
+        "ALLOW",
         List.of(new RuleCommand(null, "ALL", null), new RuleCommand("DEPT_CODE", "=", "APAC")),
         List.of()
     );
@@ -67,6 +68,7 @@ class PermissionServiceTest {
         10L,
         1L,
         "SELECT",
+        "ALLOW",
         List.of(new RuleCommand("DEPT_CODE", "CUSTOM_PREDICATE", "1=1")),
         List.of()
     );
@@ -82,6 +84,7 @@ class PermissionServiceTest {
         10L,
         1L,
         "SELECT",
+        "ALLOW",
         List.of(new RuleCommand(null, "MY_DEPT", null), new RuleCommand(null, "SELF", null)),
         List.of()
     );
@@ -103,6 +106,7 @@ class PermissionServiceTest {
         10L,
         1L,
         "SELECT",
+        "ALLOW",
         List.of(new RuleCommand(null, "DEPT", "HR"), new RuleCommand(null, "EMP_NO", "E2001")),
         List.of()
     );
@@ -124,6 +128,7 @@ class PermissionServiceTest {
         10L,
         1L,
         "SELECT",
+        "ALLOW",
         List.of(new RuleCommand(null, "DEPT", "")),
         List.of()
     );
@@ -133,6 +138,23 @@ class PermissionServiceTest {
         .hasMessageContaining("값이 필요");
   }
 
+  @Test
+  void acceptsDenyPermissionEffect() {
+    var command = new PermissionSetCommand(
+        10L,
+        1L,
+        "SELECT",
+        "DENY",
+        List.of(new RuleCommand("DEPT_CODE", "=", "HR")),
+        List.of()
+    );
+
+    permissionService.savePermissionSet(command);
+
+    FakePermissionMapper mapper = (FakePermissionMapper) permissionMapper;
+    assertThat(mapper.insertedEffect).isEqualTo("DENY");
+  }
+
   @Test
   void disablesProtectedObjectWhenLastPermissionIsDeleted() {
     var mapper = new FakePermissionMapper();
@@ -209,14 +231,22 @@ class PermissionServiceTest {
       return 0;
     }
 
+    private String insertedEffect;
+
     @Override
-    public void insertPermission(long permissionId, long roleId, long objectId, String action) {
+    public void insertPermission(long permissionId, long roleId, long objectId, String action, String permissionEffect) {
+      insertedEffect = permissionEffect;
     }
 
     @Override
     public void updatePermissionAction(long permissionId, String action) {
     }
 
+    @Override
+    public void updatePermissionEffect(long permissionId, String permissionEffect) {
+      insertedEffect = permissionEffect;
+    }
+
     @Override
     public void deleteRules(long permissionId) {
     }