diff --git a/src/main/java/com/promsearch/auth/infrastructure/persistence/SocialAccountPersistenceAdapter.java b/src/main/java/com/promsearch/auth/infrastructure/persistence/SocialAccountPersistenceAdapter.java
index 430d5ab..9ebc128 100644
--- a/src/main/java/com/promsearch/auth/infrastructure/persistence/SocialAccountPersistenceAdapter.java
+++ b/src/main/java/com/promsearch/auth/infrastructure/persistence/SocialAccountPersistenceAdapter.java
@@ -7,6 +7,7 @@
 import com.promsearch.auth.domain.enums.SocialProvider;
 import com.promsearch.auth.domain.exception.AuthDomainException;
 import com.promsearch.auth.domain.exception.AuthErrorCode;
+import com.promsearch.user.application.port.out.social.DeleteUserSocialAccountsPort;
 import java.util.Optional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.dao.DataIntegrityViolationException;
@@ -14,7 +15,10 @@
 
 @Component
 @RequiredArgsConstructor
-public class SocialAccountPersistenceAdapter implements LoadSocialAccountPort, SaveSocialAccountPort {
+public class SocialAccountPersistenceAdapter implements
+        LoadSocialAccountPort,
+        SaveSocialAccountPort,
+        DeleteUserSocialAccountsPort {
 
     private final SocialAccountRepository socialAccountRepository;
 
@@ -36,4 +40,9 @@ public Optional<SocialAccount> findByProviderAndProviderUserId(SocialProvider pr
         return socialAccountRepository.findByProviderAndProviderUserId(provider, providerUserId)
                 .map(SocialAccountJpaEntity::toDomain);
     }
+
+    @Override
+    public void deleteByUserId(Long userId) {
+        socialAccountRepository.deleteByUserId(userId);
+    }
 }
diff --git a/src/main/java/com/promsearch/auth/infrastructure/persistence/SocialAccountRepository.java b/src/main/java/com/promsearch/auth/infrastructure/persistence/SocialAccountRepository.java
index 4a8640f..2499b98 100644
--- a/src/main/java/com/promsearch/auth/infrastructure/persistence/SocialAccountRepository.java
+++ b/src/main/java/com/promsearch/auth/infrastructure/persistence/SocialAccountRepository.java
@@ -10,4 +10,6 @@ public interface SocialAccountRepository extends JpaRepository<SocialAccountJpaE
     Optional<SocialAccountJpaEntity> findByProviderAndProviderUserId(SocialProvider provider, String providerUserId);
 
     boolean existsByProviderAndProviderUserId(SocialProvider provider, String providerUserId);
+
+    void deleteByUserId(Long userId);
 }
diff --git a/src/main/java/com/promsearch/user/application/port/out/social/DeleteUserSocialAccountsPort.java b/src/main/java/com/promsearch/user/application/port/out/social/DeleteUserSocialAccountsPort.java
new file mode 100644
index 0000000..7eb3b37
--- /dev/null
+++ b/src/main/java/com/promsearch/user/application/port/out/social/DeleteUserSocialAccountsPort.java
@@ -0,0 +1,13 @@
+package com.promsearch.user.application.port.out.social;
+
+/**
+ * 탈퇴한 사용자의 외부 로그인 연결을 제거하는 출력 포트.
+ *
+ * <p>소셜 제공자 측 연결은 유지하되, 우리 서비스의 연결 정보만 제거하여
+ * 동일한 소셜 계정으로 다시 가입할 수 있게 한다.</p>
+ */
+public interface DeleteUserSocialAccountsPort {
+
+    /** 사용자의 모든 내부 소셜 로그인 연결을 제거한다. */
+    void deleteByUserId(Long userId);
+}
diff --git a/src/main/java/com/promsearch/user/application/service/command/UserCommandService.java b/src/main/java/com/promsearch/user/application/service/command/UserCommandService.java
index f403b3c..feda219 100644
--- a/src/main/java/com/promsearch/user/application/service/command/UserCommandService.java
+++ b/src/main/java/com/promsearch/user/application/service/command/UserCommandService.java
@@ -8,6 +8,7 @@
 import com.promsearch.user.application.port.out.user.SaveUserPort;
 import com.promsearch.user.application.port.out.profileimage.ProfileImageDeliveryPort;
 import com.promsearch.user.application.port.out.profileimage.ScheduleProfileImageDeletionPort;
+import com.promsearch.user.application.port.out.social.DeleteUserSocialAccountsPort;
 import com.promsearch.user.application.usecase.BootstrapAdminAccountUseCase;
 import com.promsearch.user.application.usecase.ChangePasswordUseCase;
 import com.promsearch.user.application.usecase.DeleteUserUseCase;
@@ -67,6 +68,7 @@ public class UserCommandService implements
     private final PasswordEncoder passwordEncoder;
     private final ProfileImageDeliveryPort profileImageDeliveryPort;
     private final ScheduleProfileImageDeletionPort profileImageDeletionPort;
+    private final DeleteUserSocialAccountsPort deleteUserSocialAccountsPort;
 
     @Override
     public SignupInfo signup(SignupCommand command) {
@@ -148,6 +150,7 @@ public void changePassword(ChangePasswordCommand command) {
     public void delete(Long userId) {
         User user = loadUserPort.getById(userId);
         saveUserPort.update(user.delete());
+        deleteUserSocialAccountsPort.deleteByUserId(userId);
         profileImageDeletionPort.afterCommit(user.getProfileImageObjectKey());
         log.info("user_deleted userId={}", userId);
     }
diff --git a/src/test/java/com/promsearch/user/application/service/command/UserCommandServiceTest.java b/src/test/java/com/promsearch/user/application/service/command/UserCommandServiceTest.java
index cb5e210..1141901 100644
--- a/src/test/java/com/promsearch/user/application/service/command/UserCommandServiceTest.java
+++ b/src/test/java/com/promsearch/user/application/service/command/UserCommandServiceTest.java
@@ -33,6 +33,7 @@ class UserCommandServiceTest {
 
     private FakeUserRepository userRepository;
     private FakeSaveUserInterestTagPort saveUserInterestTagPort;
+    private Long deletedSocialAccountUserId;
     private UserCommandService userCommandService;
 
     @BeforeEach
@@ -50,7 +51,8 @@ void setUp() {
                 new TestPasswordEncoder(),
                 (externalUrl, objectKey) -> objectKey == null ? externalUrl : "signed:" + objectKey,
                 objectKey -> {
-                }
+                },
+                userId -> deletedSocialAccountUserId = userId
         );
     }
 
@@ -190,6 +192,7 @@ void deleteMarksUserAsDeletedAndAnonymizesUniqueInformation() {
         assertThat(deletedUser.getNickname()).startsWith("deleted_1_").endsWith("_user");
         assertThat(deletedUser.getName()).isEqualTo("Deleted User");
         assertThat(deletedUser.getProfileImageUrl()).isNull();
+        assertThat(deletedSocialAccountUserId).isEqualTo(1L);
     }
 
     @Test