diff --git a/backend/src/docs/member.adoc b/backend/src/docs/member.adoc
new file mode 100644
index 00000000..bad4a425
--- /dev/null
+++ b/backend/src/docs/member.adoc
@@ -0,0 +1,6 @@
+:doctype: book
+:icons: font
+:source-highlighter: highlightjs
+:toc: left
+:toclevels: 4
+
diff --git a/backend/src/main/java/com/twtw/backend/domain/member/controller/MemberController.java b/backend/src/main/java/com/twtw/backend/domain/member/controller/MemberController.java
index bd908d49..d6a73b62 100644
--- a/backend/src/main/java/com/twtw/backend/domain/member/controller/MemberController.java
+++ b/backend/src/main/java/com/twtw/backend/domain/member/controller/MemberController.java
@@ -1,7 +1,11 @@
 package com.twtw.backend.domain.member.controller;
 
+import com.twtw.backend.domain.member.dto.response.DuplicateNicknameDto;
 import com.twtw.backend.domain.member.service.MemberService;
 
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -13,4 +17,9 @@ public class MemberController {
     public MemberController(MemberService memberService) {
         this.memberService = memberService;
     }
+
+    @GetMapping("/duplicate/{name}")
+    public ResponseEntity<DuplicateNicknameDto> duplicateNickname(@PathVariable String name) {
+        return ResponseEntity.ok(memberService.duplicateNickname(name));
+    }
 }
diff --git a/backend/src/main/java/com/twtw/backend/domain/member/dto/response/DuplicateNicknameDto.java b/backend/src/main/java/com/twtw/backend/domain/member/dto/response/DuplicateNicknameDto.java
new file mode 100644
index 00000000..3ab97e27
--- /dev/null
+++ b/backend/src/main/java/com/twtw/backend/domain/member/dto/response/DuplicateNicknameDto.java
@@ -0,0 +1,12 @@
+package com.twtw.backend.domain.member.dto.response;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor
+@AllArgsConstructor
+public class DuplicateNicknameDto {
+    private Boolean isPresent;
+}
diff --git a/backend/src/main/java/com/twtw/backend/domain/member/repository/MemberRepository.java b/backend/src/main/java/com/twtw/backend/domain/member/repository/MemberRepository.java
index 7ad4a864..cf99b679 100644
--- a/backend/src/main/java/com/twtw/backend/domain/member/repository/MemberRepository.java
+++ b/backend/src/main/java/com/twtw/backend/domain/member/repository/MemberRepository.java
@@ -12,6 +12,8 @@
 public interface MemberRepository extends JpaRepository<Member, UUID> {
     Optional<Member> findById(UUID uuid);
 
+    Optional<Member> findByNickname(String nickName);
+
     @Query(
             "SELECT m FROM Member m WHERE m.oAuth2Info.clientId = :oAuthId AND"
                     + " m.oAuth2Info.authType = :authType")
diff --git a/backend/src/main/java/com/twtw/backend/domain/member/service/MemberService.java b/backend/src/main/java/com/twtw/backend/domain/member/service/MemberService.java
index 535d48cc..c4f5ccfb 100644
--- a/backend/src/main/java/com/twtw/backend/domain/member/service/MemberService.java
+++ b/backend/src/main/java/com/twtw/backend/domain/member/service/MemberService.java
@@ -1,9 +1,15 @@
 package com.twtw.backend.domain.member.service;
 
+import com.twtw.backend.domain.member.dto.response.DuplicateNicknameDto;
+import com.twtw.backend.domain.member.entity.Member;
 import com.twtw.backend.domain.member.repository.MemberRepository;
+import com.twtw.backend.global.exception.EntityNotFoundException;
 
 import org.springframework.stereotype.Service;
 
+import java.util.Optional;
+import java.util.UUID;
+
 @Service
 public class MemberService {
     private final MemberRepository memberRepository;
@@ -11,4 +17,20 @@ public class MemberService {
     public MemberService(MemberRepository memberRepository) {
         this.memberRepository = memberRepository;
     }
+
+    public DuplicateNicknameDto duplicateNickname(String nickName) {
+        Optional<Member> member = memberRepository.findByNickname(nickName);
+
+        if (member.isPresent()) {
+            return new DuplicateNicknameDto(true);
+        }
+
+        return new DuplicateNicknameDto(false);
+    }
+
+    public Member getMemberById(UUID id) {
+        Member member = memberRepository.findById(id).orElseThrow(EntityNotFoundException::new);
+
+        return member;
+    }
 }