diff --git a/src/main/java/com/noplanb/domain/auth/repository/TokenRepository.java b/src/main/java/com/noplanb/domain/auth/repository/TokenRepository.java
index 1b040c1..0a10a00 100644
--- a/src/main/java/com/noplanb/domain/auth/repository/TokenRepository.java
+++ b/src/main/java/com/noplanb/domain/auth/repository/TokenRepository.java
@@ -1,6 +1,7 @@
 package com.noplanb.domain.auth.repository;
 
 import com.noplanb.domain.auth.domain.Token;
+import com.noplanb.domain.user.domain.User;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
@@ -8,7 +9,7 @@
 
 @Repository
 public interface TokenRepository extends JpaRepository<Token, Long> {
-    Optional<Token> findByEmail(String email);
+    Token findByEmail(String email);
     Optional<Token> findByRefreshToken(String refreshToken);
 
 }
\ No newline at end of file
diff --git a/src/main/java/com/noplanb/domain/character/domain/Character.java b/src/main/java/com/noplanb/domain/character/domain/Character.java
index 5c97fc6..adb198d 100644
--- a/src/main/java/com/noplanb/domain/character/domain/Character.java
+++ b/src/main/java/com/noplanb/domain/character/domain/Character.java
@@ -30,16 +30,15 @@ public class Character extends BaseEntity {
     private Long todayExp;
     private Long level;
 
-//    @OneToOne(mappedBy = "character", fetch = FetchType.LAZY)
-//    private User user;
     @OneToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", unique = true)
     private User user;
 
     @JsonIgnore
-    @OneToMany(mappedBy = "character", fetch = FetchType.LAZY)
+    @OneToMany(mappedBy = "character", fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true)
     private List<Quest> quests = new ArrayList<>();
-    @OneToMany(mappedBy = "character")
+
+    @OneToMany(mappedBy = "character", cascade = CascadeType.ALL, orphanRemoval = true)
     private List<Item> items = new ArrayList<>();
 
 
diff --git a/src/main/java/com/noplanb/domain/character/repository/CharacterRepository.java b/src/main/java/com/noplanb/domain/character/repository/CharacterRepository.java
index af8d3d5..8546895 100644
--- a/src/main/java/com/noplanb/domain/character/repository/CharacterRepository.java
+++ b/src/main/java/com/noplanb/domain/character/repository/CharacterRepository.java
@@ -12,4 +12,6 @@ public interface CharacterRepository extends JpaRepository<Character,Long> {
     Optional<Character> findByUserId(Long id);
 
     boolean existsByUser(User user);
+
+    void deleteByUser(User user);
 }
diff --git a/src/main/java/com/noplanb/domain/user/application/UserService.java b/src/main/java/com/noplanb/domain/user/application/UserService.java
index 8636766..3d9fcc8 100644
--- a/src/main/java/com/noplanb/domain/user/application/UserService.java
+++ b/src/main/java/com/noplanb/domain/user/application/UserService.java
@@ -1,5 +1,7 @@
 package com.noplanb.domain.user.application;
 
+import com.noplanb.domain.auth.domain.Token;
+import com.noplanb.domain.auth.repository.TokenRepository;
 import com.noplanb.domain.character.domain.Character;
 import com.noplanb.domain.character.repository.CharacterRepository;
 import com.noplanb.domain.user.domain.User;
@@ -21,7 +23,8 @@
 @Transactional(readOnly = true)
 public class UserService {
 
-    final UserRepository userRepository;
+    private final TokenRepository tokenRepository;
+    private final UserRepository userRepository;
     private final CharacterRepository characterRepository;
 
     @Transactional
@@ -61,4 +64,26 @@ public ResponseEntity<?> getUserCharacterExist(UserPrincipal userPrincipal) {
         return ResponseEntity.ok(apiResponse);
     }
 
+    @Transactional
+    public ResponseEntity<?> cancelAccount(UserPrincipal userPrincipal) {
+        User user = userRepository.findById(userPrincipal.getId()).orElseThrow(() -> new IllegalArgumentException("사용자를 찾을 수 없습니다."));
+        String email = user.getEmail();
+
+        // 토큰 정보 삭제
+        Token token = tokenRepository.findByEmail(email);
+        if (token != null) { tokenRepository.delete(token); }
+
+        // 캐릭터 정보 삭제
+        characterRepository.deleteByUser(user);
+
+        // 유저 정보 삭제
+        userRepository.delete(user);
+
+        ApiResponse apiResponse = ApiResponse.builder()
+                .check(true)
+                .information("회원 탈퇴가 완료되었습니다.")
+                .build();
+
+        return ResponseEntity.ok(apiResponse);
+    }
 }
diff --git a/src/main/java/com/noplanb/domain/user/controller/UserController.java b/src/main/java/com/noplanb/domain/user/controller/UserController.java
index 6b2513f..de9e9e6 100644
--- a/src/main/java/com/noplanb/domain/user/controller/UserController.java
+++ b/src/main/java/com/noplanb/domain/user/controller/UserController.java
@@ -18,7 +18,9 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 
 @Controller
@@ -48,4 +50,16 @@ public ResponseEntity<?> getMyAccount(@Parameter @CurrentUser UserPrincipal user
     public ResponseEntity<?> getUserCharacterExist(@Parameter @CurrentUser UserPrincipal userPrincipal){
         return userService.getUserCharacterExist(userPrincipal);
     }
+
+    @Operation(summary = "회원 탈퇴 API", description = "회원 탈퇴 API입니다.")
+    @ApiResponses(value = {
+            @ApiResponse(responseCode = "200", description = "탈퇴 성공", content = { @Content(mediaType = "application/json", schema = @Schema(implementation = Message.class) ) } ),
+            @ApiResponse(responseCode = "400", description = "탈퇴 실패", content = { @Content(mediaType = "application/json", schema = @Schema(implementation = ErrorResponse.class) ) } ),
+    })
+    @DeleteMapping("/user")
+    public ResponseEntity<?> cancelAccount(@Parameter @CurrentUser UserPrincipal userPrincipal) {
+        {
+            return userService.cancelAccount(userPrincipal);
+        }
+    }
 }