diff --git a/src/main/java/clap/server/adapter/outbound/persistense/CategoryPersistenceAdapter.java b/src/main/java/clap/server/adapter/outbound/persistense/CategoryPersistenceAdapter.java
index ed9f1a7f..e99883db 100644
--- a/src/main/java/clap/server/adapter/outbound/persistense/CategoryPersistenceAdapter.java
+++ b/src/main/java/clap/server/adapter/outbound/persistense/CategoryPersistenceAdapter.java
@@ -51,7 +51,7 @@ public List<Category> findSubCategory() {
 
     @Override
     public boolean existsByNameOrCode(String name, String code) {
-        return categoryRepository.existsByNameOrCode(name, code);
+        return categoryRepository.existsByNameOrCodeAndIsDeletedFalse(name, code);
     }
 
     @Override
diff --git a/src/main/java/clap/server/adapter/outbound/persistense/repository/task/CategoryRepository.java b/src/main/java/clap/server/adapter/outbound/persistense/repository/task/CategoryRepository.java
index a5bec1e3..5cdcc2b1 100644
--- a/src/main/java/clap/server/adapter/outbound/persistense/repository/task/CategoryRepository.java
+++ b/src/main/java/clap/server/adapter/outbound/persistense/repository/task/CategoryRepository.java
@@ -12,5 +12,5 @@ public interface CategoryRepository extends JpaRepository<CategoryEntity, Long>
     List<CategoryEntity> findByIsDeletedFalseAndMainCategoryIsNull();
     List<CategoryEntity> findByIsDeletedFalseAndMainCategoryIsNotNull();
 
-    boolean existsByNameOrCode(String name, String code);
+    boolean existsByNameOrCodeAndIsDeletedFalse(String name, String code);
 }
\ No newline at end of file
diff --git a/src/main/java/clap/server/application/service/admin/UpdateCategoryService.java b/src/main/java/clap/server/application/service/admin/UpdateCategoryService.java
index 29ac6249..cae97710 100644
--- a/src/main/java/clap/server/application/service/admin/UpdateCategoryService.java
+++ b/src/main/java/clap/server/application/service/admin/UpdateCategoryService.java
@@ -12,6 +12,7 @@
 import org.springframework.transaction.annotation.Transactional;
 
 import static clap.server.exception.code.MemberErrorCode.ACTIVE_MEMBER_NOT_FOUND;
+import static clap.server.exception.code.TaskErrorCode.CATEGORY_DUPLICATE;
 import static clap.server.exception.code.TaskErrorCode.CATEGORY_NOT_FOUND;
 
 @ApplicationService
@@ -25,6 +26,7 @@ public class UpdateCategoryService implements UpdateCategoryUsecase {
     @Transactional
     public void updateCategory(Long adminId, Long categoryId, String name, String code, String descriptionExample) {
         Member admin = loadMemberPort.findActiveMemberById(adminId).orElseThrow(() -> new ApplicationException(ACTIVE_MEMBER_NOT_FOUND));
+        if (loadCategoryPort.existsByNameOrCode(name, code)) throw new ApplicationException(CATEGORY_DUPLICATE);
         Category category = loadCategoryPort.findById(categoryId)
                 .orElseThrow(() -> new ApplicationException(CATEGORY_NOT_FOUND));
         category.updateCategory(admin, name, code, descriptionExample);