diff --git a/src/main/java/yerong/wedle/member/controller/MemberApiController.java b/src/main/java/yerong/wedle/member/controller/MemberApiController.java
index b7765e5..c61174d 100644
--- a/src/main/java/yerong/wedle/member/controller/MemberApiController.java
+++ b/src/main/java/yerong/wedle/member/controller/MemberApiController.java
@@ -9,6 +9,7 @@
 import org.springframework.web.bind.annotation.*;
 import yerong.wedle.department.dto.DepartmentResponse;
 import yerong.wedle.department.service.DepartmentService;
+import yerong.wedle.member.dto.NicknameDuplicateResponse;
 import yerong.wedle.member.dto.NicknameRequest;
 import yerong.wedle.member.dto.NicknameResponse;
 import yerong.wedle.member.service.MemberService;
@@ -47,6 +48,16 @@ public ResponseEntity<NicknameResponse> updateNickname(@RequestBody NicknameRequ
         return ResponseEntity.ok(memberService.setNickname(nicknameRequest));
     }
 
+    @Operation(summary = "닉네임 중복 체크", description = "닉네임의 중복 여부를 확인합니다")
+    @ApiResponses({
+            @ApiResponse(responseCode = "200", description = "닉네임 중복 확인 성공")
+    })
+    @GetMapping("/nickname/check")
+    public ResponseEntity<NicknameDuplicateResponse> checkNicknameDuplicate(@RequestParam String nickname) {
+        NicknameDuplicateResponse nicknameDuplicateResponse = memberService.checkNicknameDuplicate(nickname);
+        return ResponseEntity.ok(nicknameDuplicateResponse);
+    }
+
     @GetMapping("/nickname")
     public ResponseEntity<NicknameResponse> getNickname() {
         return ResponseEntity.ok(memberService.getNickname());
diff --git a/src/main/java/yerong/wedle/member/dto/NicknameDuplicateResponse.java b/src/main/java/yerong/wedle/member/dto/NicknameDuplicateResponse.java
new file mode 100644
index 0000000..e036169
--- /dev/null
+++ b/src/main/java/yerong/wedle/member/dto/NicknameDuplicateResponse.java
@@ -0,0 +1,11 @@
+package yerong.wedle.member.dto;
+
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@Builder
+public class NicknameDuplicateResponse {
+    private final boolean isDuplicate;
+    private final String message;
+}
diff --git a/src/main/java/yerong/wedle/member/service/MemberService.java b/src/main/java/yerong/wedle/member/service/MemberService.java
index 15a8e16..0c6c677 100644
--- a/src/main/java/yerong/wedle/member/service/MemberService.java
+++ b/src/main/java/yerong/wedle/member/service/MemberService.java
@@ -4,6 +4,7 @@
 import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.stereotype.Service;
 import yerong.wedle.member.domain.Member;
+import yerong.wedle.member.dto.NicknameDuplicateResponse;
 import yerong.wedle.member.dto.NicknameRequest;
 import yerong.wedle.member.dto.NicknameResponse;
 import yerong.wedle.member.exception.ExistingNicknameException;
@@ -56,4 +57,29 @@ private String getCurrentUserId() {
 
         return socialId;
     }
+
+    public NicknameDuplicateResponse checkNicknameDuplicate(String  nickname) {
+        String socialId = getCurrentUserId();
+        Member member = memberRepository.findBySocialId(socialId)
+                .orElseThrow(MemberNotFoundException::new);
+
+        String message = "";
+        boolean isDuplicate = false;
+
+        if (member.getNickname() != null && member.getNickname().equals(nickname)) {
+            message = "기존 닉네임과 동일합니다.";
+            isDuplicate = true;
+        } else if (isNicknameDuplicate(nickname)) {
+            message = "이미 존재하는 닉네임입니다.";
+            isDuplicate = true;
+        } else {
+            message = "사용 가능한 닉네임입니다.";
+            isDuplicate = false;
+        }
+
+        return NicknameDuplicateResponse.builder()
+                .isDuplicate(isDuplicate)
+                .message(message)
+                .build();
+    }
 }