diff --git a/src/main/java/com/linkode/api_server/controller/MemberController.java b/src/main/java/com/linkode/api_server/controller/MemberController.java
index a0ae35a..984136c 100644
--- a/src/main/java/com/linkode/api_server/controller/MemberController.java
+++ b/src/main/java/com/linkode/api_server/controller/MemberController.java
@@ -3,6 +3,7 @@
 import com.linkode.api_server.common.response.BaseResponse;
 import com.linkode.api_server.common.response.status.BaseExceptionResponseStatus;
 import com.linkode.api_server.dto.member.CreateAvatarRequest;
+import com.linkode.api_server.dto.member.UpdateAvatarRequest;
 import com.linkode.api_server.service.MemberService;
 import com.linkode.api_server.util.JwtProvider;
 import lombok.RequiredArgsConstructor;
@@ -32,4 +33,15 @@ public BaseResponse<Void> createAvatar(@RequestBody CreateAvatarRequest createAv
         return new BaseResponse<>(null);
     }
 
+    /**
+     * 캐릭터 수정(프로필 수정)
+     */
+    @PatchMapping("/avatar")
+    public BaseResponse<Void> modifyAvatar(@RequestHeader("Authorization") String authorization, @RequestBody UpdateAvatarRequest request) {
+        log.info("[MemberController.modifyAvatar]");
+        Long memberId = jwtProvider.extractIdFromHeader(authorization);
+        memberService.updateAvatar(memberId, request);
+        return new BaseResponse<>(null);
+    }
+
 }
diff --git a/src/main/java/com/linkode/api_server/domain/Member.java b/src/main/java/com/linkode/api_server/domain/Member.java
index 6493855..62a1634 100644
--- a/src/main/java/com/linkode/api_server/domain/Member.java
+++ b/src/main/java/com/linkode/api_server/domain/Member.java
@@ -68,4 +68,11 @@ public Member(String githubId, String nickname, Avatar avatar, String color, Bas
         this.avatar = avatar;
         this.status = status;
     }
+
+    public void updateMemberInfo(String nickname, Avatar avatar, String color){
+        this.nickname=nickname;
+        this.avatar=avatar;
+        this.color=color;
+    }
+
 }
diff --git a/src/main/java/com/linkode/api_server/dto/member/UpdateAvatarRequest.java b/src/main/java/com/linkode/api_server/dto/member/UpdateAvatarRequest.java
new file mode 100644
index 0000000..65602ac
--- /dev/null
+++ b/src/main/java/com/linkode/api_server/dto/member/UpdateAvatarRequest.java
@@ -0,0 +1,15 @@
+package com.linkode.api_server.dto.member;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+@Getter @Setter
+@AllArgsConstructor
+@NoArgsConstructor
+public class UpdateAvatarRequest {
+    private String nickname;
+    private Long avatarId;
+    private String color;
+}
diff --git a/src/main/java/com/linkode/api_server/repository/AvatarRepository.java b/src/main/java/com/linkode/api_server/repository/AvatarRepository.java
index b8e0ae4..9acf334 100644
--- a/src/main/java/com/linkode/api_server/repository/AvatarRepository.java
+++ b/src/main/java/com/linkode/api_server/repository/AvatarRepository.java
@@ -2,8 +2,9 @@
 
 import com.linkode.api_server.domain.Avatar;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
 
+@Repository
 public interface AvatarRepository extends JpaRepository<Avatar, Long> {
 
-
 }
diff --git a/src/main/java/com/linkode/api_server/repository/MemberRepository.java b/src/main/java/com/linkode/api_server/repository/MemberRepository.java
index f2b2f73..1f8fa87 100644
--- a/src/main/java/com/linkode/api_server/repository/MemberRepository.java
+++ b/src/main/java/com/linkode/api_server/repository/MemberRepository.java
@@ -3,11 +3,15 @@
 import com.linkode.api_server.domain.Member;
 import com.linkode.api_server.domain.base.BaseStatus;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
 
 import java.util.Optional;
 
+@Repository
 public interface MemberRepository extends JpaRepository<Member, Long> {
 
     boolean existsByGithubIdAndStatus(String githubId, BaseStatus ACTIVE);
     Optional<Member> findByGithubIdAndStatus(String githubId, BaseStatus ACTIVE);
+    Optional<Member> findByMemberIdAndStatus(long memberId, BaseStatus ACTIVE);
+
 }
diff --git a/src/main/java/com/linkode/api_server/service/MemberService.java b/src/main/java/com/linkode/api_server/service/MemberService.java
index 3b2ba2a..c27261f 100644
--- a/src/main/java/com/linkode/api_server/service/MemberService.java
+++ b/src/main/java/com/linkode/api_server/service/MemberService.java
@@ -6,6 +6,7 @@
 import com.linkode.api_server.domain.Member;
 import com.linkode.api_server.domain.base.BaseStatus;
 import com.linkode.api_server.dto.member.CreateAvatarRequest;
+import com.linkode.api_server.dto.member.UpdateAvatarRequest;
 import com.linkode.api_server.repository.AvatarRepository;
 import com.linkode.api_server.repository.MemberRepository;
 import lombok.RequiredArgsConstructor;
@@ -43,4 +44,25 @@ public void createAvatar(CreateAvatarRequest createAvatarRequest){
             memberRepository.save(member);
         }
     }
+
+
+    @Transactional
+    public void updateAvatar(long memberId, UpdateAvatarRequest request){
+        log.info("[MemberService.updateAvatar]");
+        Member member = memberRepository.findByMemberIdAndStatus(memberId,BaseStatus.ACTIVE)
+                .orElseThrow(()-> new IllegalArgumentException("Invalid memberId: " + memberId));
+
+        String newNickname= request.getNickname()==null ? member.getNickname():request.getNickname() ;
+
+        Avatar newAvatar= request.getAvatarId()==null ? member.getAvatar() : avatarRepository.findById(request.getAvatarId())
+                .orElseThrow(()-> new IllegalArgumentException("Invalid avatarId: " + request.getAvatarId()));
+
+        String newColor= request.getColor()==null ? member.getColor(): request.getColor();
+
+        member.updateMemberInfo(newNickname,newAvatar,newColor);
+
+        memberRepository.save(member);
+
+    }
+
 }