diff --git a/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/bean/UpdateUserBean.java b/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/bean/UpdateUserBean.java
new file mode 100644
index 0000000..34f1f96
--- /dev/null
+++ b/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/bean/UpdateUserBean.java
@@ -0,0 +1,39 @@
+package HalfFifty.HalfFifty_BE.user.bean;
+
+import HalfFifty.HalfFifty_BE.user.bean.small.GetUserDAOBean;
+import HalfFifty.HalfFifty_BE.user.bean.small.SaveUserDAOBean;
+import HalfFifty.HalfFifty_BE.user.domain.DTO.RequestUserUpdateDTO;
+import HalfFifty.HalfFifty_BE.user.domain.UserDAO;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Component
+public class UpdateUserBean {
+    GetUserDAOBean getUserDAOBean;
+    SaveUserDAOBean saveUserDAOBean;
+
+    @Autowired
+    public UpdateUserBean(GetUserDAOBean getUserDAOBean, SaveUserDAOBean saveUserDAOBean) {
+        this.getUserDAOBean = getUserDAOBean;
+        this.saveUserDAOBean = saveUserDAOBean;
+    }
+
+    public UUID exec(RequestUserUpdateDTO requestUserUpdateDTO) {
+        // 유저 id를 통해 원하는 객체 찾기
+        UserDAO userDAO = getUserDAOBean.exec(requestUserUpdateDTO.getUserId());
+        if(userDAO == null) return null;
+
+        // 객체 수정
+        userDAO.setNickName(requestUserUpdateDTO.getNickname());
+        userDAO.setUpdatedAt(LocalDateTime.now());
+
+        // 수정한 객체 저장
+        saveUserDAOBean.exec(userDAO);
+
+        // 수정한 객체 키값 반환
+        return userDAO.getUserId();
+    }
+}
diff --git a/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/controller/UserController.java b/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/controller/UserController.java
index f75c8c3..fa77135 100644
--- a/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/controller/UserController.java
+++ b/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/controller/UserController.java
@@ -1,6 +1,7 @@
 package HalfFifty.HalfFifty_BE.user.controller;
 
 import HalfFifty.HalfFifty_BE.user.domain.DTO.RequestUserSaveDTO;
+import HalfFifty.HalfFifty_BE.user.domain.DTO.RequestUserUpdateDTO;
 import HalfFifty.HalfFifty_BE.user.domain.DTO.ResponseUserGetDTO;
 import HalfFifty.HalfFifty_BE.user.service.UserService;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -42,6 +43,24 @@ public ResponseEntity<Map<String, Object>> getUserProfile(@PathVariable("userId"
         return ResponseEntity.status(HttpStatus.OK).body(requestMap);
     }
 
+    @PutMapping
+    public ResponseEntity<Map<String, Object>> updateUser(@RequestBody RequestUserUpdateDTO requestUserUpdateDTO) {
+        // 유저 닉네임 수정 service
+        UUID userId = userService.updateUser(requestUserUpdateDTO);
+
+        // 유저  닉네임 수정 여부
+        boolean success = userId != null;
+
+        // Map을 통해 메시지와 id 값 json 테이터로 변환
+        Map<String, Object> requestMap = new HashMap<>();
+        requestMap.put("success", success);
+        requestMap.put("message", success ? "유저 닉네임 수정 성공" : "유저 닉네임 수정 실패");
+        requestMap.put("userId", userId);
+
+        // status, body 설정해서 응답 리턴
+        return ResponseEntity.status(HttpStatus.OK).body(requestMap);
+    }
+
     @PostMapping
     public ResponseEntity<Map<String, Object>> saveUser(@RequestBody RequestUserSaveDTO requestUserSaveDTO) {
         // 유저 회원가입 service
diff --git a/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/domain/DTO/RequestUserUpdateDTO.java b/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/domain/DTO/RequestUserUpdateDTO.java
new file mode 100644
index 0000000..ddeee26
--- /dev/null
+++ b/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/domain/DTO/RequestUserUpdateDTO.java
@@ -0,0 +1,13 @@
+package HalfFifty.HalfFifty_BE.user.domain.DTO;
+
+import lombok.Data;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+@Data
+public class RequestUserUpdateDTO {
+    UUID userId;
+    String nickname;
+    LocalDateTime updatedAt;
+}
diff --git a/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/service/UserService.java b/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/service/UserService.java
index 066298d..e845a86 100644
--- a/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/service/UserService.java
+++ b/HalfFifty_BE/src/main/java/HalfFifty/HalfFifty_BE/user/service/UserService.java
@@ -2,7 +2,9 @@
 
 import HalfFifty.HalfFifty_BE.user.bean.GetUserBean;
 import HalfFifty.HalfFifty_BE.user.bean.SaveUserBean;
+import HalfFifty.HalfFifty_BE.user.bean.UpdateUserBean;
 import HalfFifty.HalfFifty_BE.user.domain.DTO.RequestUserSaveDTO;
+import HalfFifty.HalfFifty_BE.user.domain.DTO.RequestUserUpdateDTO;
 import HalfFifty.HalfFifty_BE.user.domain.DTO.ResponseUserGetDTO;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -13,11 +15,13 @@
 public class UserService {
     SaveUserBean saveUserBean;
     GetUserBean getUserBean;
+    UpdateUserBean updateUserBean;
 
     @Autowired
-    public UserService(SaveUserBean saveUserBean, GetUserBean getUserBean) {
+    public UserService(SaveUserBean saveUserBean, GetUserBean getUserBean, UpdateUserBean updateUserBean) {
         this.saveUserBean = saveUserBean;
         this.getUserBean = getUserBean;
+        this.updateUserBean = updateUserBean;
     }
 
     // 유저 프로필 조회
@@ -25,6 +29,11 @@ public ResponseUserGetDTO getUserProfile(UUID userId) {
         return getUserBean.exec(userId);
     }
 
+    // 유저 닉네임 수정
+    public UUID updateUser(RequestUserUpdateDTO requestUserUpdateDTO) {
+        return updateUserBean.exec(requestUserUpdateDTO);
+    }
+
     // 유저 회원가입(임시)
     public UUID exec(RequestUserSaveDTO requestUserSaveDTO) {
         return saveUserBean.exec(requestUserSaveDTO);