diff --git a/adapters/in-web/src/main/kotlin/com/pokit/user/UserController.kt b/adapters/in-web/src/main/kotlin/com/pokit/user/UserController.kt
index 4181d9ff..974aea16 100644
--- a/adapters/in-web/src/main/kotlin/com/pokit/user/UserController.kt
+++ b/adapters/in-web/src/main/kotlin/com/pokit/user/UserController.kt
@@ -3,9 +3,13 @@ package com.pokit.user
 import com.pokit.auth.config.ErrorOperation
 import com.pokit.auth.model.PrincipalUser
 import com.pokit.auth.model.toDomain
-import com.pokit.user.dto.ApiSignUpRequest
+import com.pokit.common.wrapper.ResponseWrapper.wrapOk
+import com.pokit.user.dto.request.ApiSignUpRequest
+import com.pokit.user.dto.request.ApiUpdateNicknameRequest
+import com.pokit.user.dto.request.toDto
 import com.pokit.user.dto.response.CheckDuplicateNicknameResponse
-import com.pokit.user.dto.response.SignUpResponse
+import com.pokit.user.dto.response.UserResponse
+import com.pokit.user.dto.response.toResponse
 import com.pokit.user.exception.UserErrorCode
 import com.pokit.user.port.`in`.UserUseCase
 import io.swagger.v3.oas.annotations.Operation
@@ -25,20 +29,34 @@ class UserController(
     fun signUp(
         @AuthenticationPrincipal principalUser: PrincipalUser,
         @Valid @RequestBody request: ApiSignUpRequest
-    ): ResponseEntity<SignUpResponse> {
+    ): ResponseEntity<UserResponse> {
         val user = principalUser.toDomain()
-        val signUpRequest = request.toSignUpRequest()
-        val response = userUseCase.signUp(user, signUpRequest)
-        return ResponseEntity.ok(response)
+        return userUseCase.signUp(user, request.toDto())
+            .toResponse()
+            .wrapOk()
     }
 
     @GetMapping("/duplicate/{nickname}")
     @Operation(summary = "닉네임 중복 체크 API")
     @ErrorOperation(UserErrorCode::class)
     fun checkNickname(
-        @AuthenticationPrincipal principalUser: PrincipalUser,
         @PathVariable("nickname") nickname: String
     ): ResponseEntity<CheckDuplicateNicknameResponse> {
-        return ResponseEntity.ok(userUseCase.checkDuplicateNickname(nickname))
+        return userUseCase.checkDuplicateNickname(nickname)
+            .toResponse()
+            .wrapOk()
+    }
+
+    @PutMapping("/nickname")
+    @Operation(summary = "닉네임 수정 API")
+    @ErrorOperation(UserErrorCode::class)
+    fun updateNickname(
+        @AuthenticationPrincipal principalUser: PrincipalUser,
+        @Valid @RequestBody request: ApiUpdateNicknameRequest
+    ): ResponseEntity<UserResponse> {
+        val user = principalUser.toDomain()
+        return userUseCase.updateNickname(user, request.toDto())
+            .toResponse()
+            .wrapOk()
     }
 }
diff --git a/adapters/in-web/src/main/kotlin/com/pokit/user/dto/ApiSignUpRequest.kt b/adapters/in-web/src/main/kotlin/com/pokit/user/dto/request/ApiSignUpRequest.kt
similarity index 58%
rename from adapters/in-web/src/main/kotlin/com/pokit/user/dto/ApiSignUpRequest.kt
rename to adapters/in-web/src/main/kotlin/com/pokit/user/dto/request/ApiSignUpRequest.kt
index e90f7e2a..3ab709f8 100644
--- a/adapters/in-web/src/main/kotlin/com/pokit/user/dto/ApiSignUpRequest.kt
+++ b/adapters/in-web/src/main/kotlin/com/pokit/user/dto/request/ApiSignUpRequest.kt
@@ -1,6 +1,5 @@
-package com.pokit.user.dto
+package com.pokit.user.dto.request
 
-import com.pokit.user.dto.request.SignUpRequest
 import com.pokit.user.model.InterestType
 import jakarta.validation.constraints.NotBlank
 import jakarta.validation.constraints.Size
@@ -11,15 +10,12 @@ data class ApiSignUpRequest(
     val nickName: String,
     @Size(min = 1, max = 3, message = "최소 하나 이상, 세개 이하만 가능합니다.")
     val interests: List<String>
-) {
-    fun toSignUpRequest(): SignUpRequest {
-        val interestTypes = interests.map {
-            InterestType.of(it)
-        }
+)
 
-        return SignUpRequest(
-            nickName = nickName,
-            interests = interestTypes
-        )
-    }
+internal fun ApiSignUpRequest.toDto(): SignUpRequest {
+    val interestTypes = interests.map { InterestType.of(it) }
+    return SignUpRequest(
+        nickName = this.nickName,
+        interests = interestTypes
+    )
 }
diff --git a/adapters/in-web/src/main/kotlin/com/pokit/user/dto/request/ApiUpdateNicknameRequest.kt b/adapters/in-web/src/main/kotlin/com/pokit/user/dto/request/ApiUpdateNicknameRequest.kt
new file mode 100644
index 00000000..1a90ffb3
--- /dev/null
+++ b/adapters/in-web/src/main/kotlin/com/pokit/user/dto/request/ApiUpdateNicknameRequest.kt
@@ -0,0 +1,14 @@
+package com.pokit.user.dto.request
+
+import jakarta.validation.constraints.NotBlank
+import jakarta.validation.constraints.Size
+
+data class ApiUpdateNicknameRequest(
+    @field:NotBlank(message = "닉네임은 필수값입니다.")
+    @field:Size(max = 10, message = "닉네임은 10자 이하만 가능합니다.")
+    val nickname: String
+)
+
+internal fun ApiUpdateNicknameRequest.toDto() = UpdateNicknameRequest(
+    nickname = this.nickname
+)
diff --git a/application/src/main/kotlin/com/pokit/user/port/in/UserUseCase.kt b/application/src/main/kotlin/com/pokit/user/port/in/UserUseCase.kt
index 300a4aac..62b88b69 100644
--- a/application/src/main/kotlin/com/pokit/user/port/in/UserUseCase.kt
+++ b/application/src/main/kotlin/com/pokit/user/port/in/UserUseCase.kt
@@ -1,13 +1,13 @@
 package com.pokit.user.port.`in`
 
 import com.pokit.user.dto.request.SignUpRequest
-import com.pokit.user.dto.response.CheckDuplicateNicknameResponse
-import com.pokit.user.dto.response.SignUpResponse
+import com.pokit.user.dto.request.UpdateNicknameRequest
 import com.pokit.user.model.User
 
 interface UserUseCase {
-    fun signUp(user: User, request: SignUpRequest): SignUpResponse
+    fun signUp(user: User, request: SignUpRequest): User
 
-    fun checkDuplicateNickname(nickname: String): CheckDuplicateNicknameResponse
+    fun checkDuplicateNickname(nickname: String): Boolean
 
+    fun updateNickname(user: User, request: UpdateNicknameRequest): User
 }
diff --git a/application/src/main/kotlin/com/pokit/user/port/service/UserService.kt b/application/src/main/kotlin/com/pokit/user/port/service/UserService.kt
index b159e5f7..8edcbf32 100644
--- a/application/src/main/kotlin/com/pokit/user/port/service/UserService.kt
+++ b/application/src/main/kotlin/com/pokit/user/port/service/UserService.kt
@@ -1,9 +1,9 @@
 package com.pokit.user.port.service
 
+import com.pokit.common.exception.ClientValidationException
 import com.pokit.common.exception.NotFoundCustomException
 import com.pokit.user.dto.request.SignUpRequest
-import com.pokit.user.dto.response.CheckDuplicateNicknameResponse
-import com.pokit.user.dto.response.SignUpResponse
+import com.pokit.user.dto.request.UpdateNicknameRequest
 import com.pokit.user.exception.UserErrorCode
 import com.pokit.user.model.User
 import com.pokit.user.port.`in`.UserUseCase
@@ -17,7 +17,7 @@ class UserService(
     private val userPort: UserPort
 ) : UserUseCase {
     @Transactional
-    override fun signUp(user: User, request: SignUpRequest): SignUpResponse {
+    override fun signUp(user: User, request: SignUpRequest): User {
         user.modifyUser(
             request.nickName,
         )
@@ -25,12 +25,24 @@ class UserService(
         val savedUser = userPort.register(user)
             ?: throw NotFoundCustomException(UserErrorCode.NOT_FOUND_USER)
 
-        return SignUpResponse(savedUser.id)
+        return savedUser
     }
 
-    override fun checkDuplicateNickname(nickname: String)
-        : CheckDuplicateNicknameResponse {
-        val isDuplicate = userPort.checkByNickname(nickname)
-        return CheckDuplicateNicknameResponse(isDuplicate)
+    override fun checkDuplicateNickname(nickname: String): Boolean {
+        return userPort.checkByNickname(nickname)
+    }
+
+    @Transactional
+    override fun updateNickname(user: User, request: UpdateNicknameRequest): User {
+        val findUser = (userPort.loadById(user.id)
+            ?: throw NotFoundCustomException(UserErrorCode.NOT_FOUND_USER))
+
+        val isDuplicate = userPort.checkByNickname(request.nickname)
+        if (isDuplicate) {
+            throw ClientValidationException(UserErrorCode.ALREADY_EXISTS_NICKNAME)
+        }
+
+        findUser.modifyUser(request.nickname)
+        return userPort.persist(findUser)
     }
 }
diff --git a/application/src/test/kotlin/com/pokit/user/port/service/UserServiceTest.kt b/application/src/test/kotlin/com/pokit/user/port/service/UserServiceTest.kt
index bc3d96f0..d21537d5 100644
--- a/application/src/test/kotlin/com/pokit/user/port/service/UserServiceTest.kt
+++ b/application/src/test/kotlin/com/pokit/user/port/service/UserServiceTest.kt
@@ -1,7 +1,9 @@
 package com.pokit.user.port.service
 
+import com.pokit.common.exception.ClientValidationException
 import com.pokit.common.exception.NotFoundCustomException
 import com.pokit.user.UserFixture
+import com.pokit.user.dto.request.UpdateNicknameRequest
 import com.pokit.user.model.User
 import com.pokit.user.port.out.UserPort
 import io.kotest.assertions.throwables.shouldThrow
@@ -25,8 +27,8 @@ class UserServiceTest : BehaviorSpec({
         When("수정하려는 정보를 받으면") {
             val response = userService.signUp(user, request)
             Then("회원 정보가 수정되고 수정된 회원의 id가 반환된다.") {
-                response.userId shouldBe modifieUser.id
-                user.nickName shouldBe modifieUser.nickName
+                response.id shouldBe modifieUser.id
+                response.nickName shouldBe modifieUser.nickName
             }
         }
 
@@ -49,14 +51,43 @@ class UserServiceTest : BehaviorSpec({
         When("해당 닉네임의 유저가 존재하지 않으면") {
             val response = userService.checkDuplicateNickname(notDuplicateName)
             Then("false가 반환된다") {
-                response.isDuplicate shouldBe false
+                response shouldBe false
             }
         }
 
         When("해당 닉네임의 유저가 존재하면 ") {
             val response = userService.checkDuplicateNickname(duplicateName)
             Then("true가 반환된다.") {
-                response.isDuplicate shouldBe true
+                response shouldBe true
+            }
+        }
+    }
+
+    Given("닉네임을 수정할 때") {
+        val user = UserFixture.getUser()
+        val request = UpdateNicknameRequest(
+            nickname = "수정하려는 닉네임"
+        )
+        val invalidRequest = UpdateNicknameRequest(
+            nickname = "이미 사용중인 닉네임"
+        )
+
+        every { userPort.loadById(user.id) } returns user
+        every { userPort.checkByNickname(request.nickname) } returns false
+        every { userPort.checkByNickname(invalidRequest.nickname) } returns true
+        every { userPort.persist(any(User::class)) } returns user
+
+        When("사용 가능한 닉네임으로 수정하려 하면 ") {
+            val userResponse = userService.updateNickname(user, request)
+            Then("수정된 유저 도메인을 반환한다.") {
+                userResponse.nickName shouldBe request.nickname
+            }
+        }
+        When("이미 사용중인 닉네임으로 수정하려 하면") {
+            Then("예외가 발생한다.") {
+                shouldThrow<ClientValidationException> {
+                    userService.updateNickname(user, invalidRequest)
+                }
             }
         }
     }
diff --git a/domain/src/main/kotlin/com/pokit/user/dto/request/UpdateNicknameRequest.kt b/domain/src/main/kotlin/com/pokit/user/dto/request/UpdateNicknameRequest.kt
new file mode 100644
index 00000000..fd806b32
--- /dev/null
+++ b/domain/src/main/kotlin/com/pokit/user/dto/request/UpdateNicknameRequest.kt
@@ -0,0 +1,5 @@
+package com.pokit.user.dto.request
+
+data class UpdateNicknameRequest(
+    val nickname: String
+)
diff --git a/domain/src/main/kotlin/com/pokit/user/dto/response/CheckDuplicateNicknameResponse.kt b/domain/src/main/kotlin/com/pokit/user/dto/response/CheckDuplicateNicknameResponse.kt
index 0b8397ef..d06493b1 100644
--- a/domain/src/main/kotlin/com/pokit/user/dto/response/CheckDuplicateNicknameResponse.kt
+++ b/domain/src/main/kotlin/com/pokit/user/dto/response/CheckDuplicateNicknameResponse.kt
@@ -3,3 +3,7 @@ package com.pokit.user.dto.response
 data class CheckDuplicateNicknameResponse(
     val isDuplicate: Boolean
 )
+
+fun Boolean.toResponse() = CheckDuplicateNicknameResponse(
+    isDuplicate = this
+)
diff --git a/domain/src/main/kotlin/com/pokit/user/dto/response/UserResponse.kt b/domain/src/main/kotlin/com/pokit/user/dto/response/UserResponse.kt
new file mode 100644
index 00000000..b52646a3
--- /dev/null
+++ b/domain/src/main/kotlin/com/pokit/user/dto/response/UserResponse.kt
@@ -0,0 +1,15 @@
+package com.pokit.user.dto.response
+
+import com.pokit.user.model.User
+
+data class UserResponse (
+    val id: Long,
+    val email: String,
+    val nickname: String
+)
+
+fun User.toResponse() = UserResponse(
+    id = this.id,
+    email = this.email,
+    nickname = this.nickName
+)
diff --git a/domain/src/main/kotlin/com/pokit/user/exception/UserErrorCode.kt b/domain/src/main/kotlin/com/pokit/user/exception/UserErrorCode.kt
index 60813b66..1293f25f 100644
--- a/domain/src/main/kotlin/com/pokit/user/exception/UserErrorCode.kt
+++ b/domain/src/main/kotlin/com/pokit/user/exception/UserErrorCode.kt
@@ -8,5 +8,6 @@ enum class UserErrorCode(
 ) : ErrorCode {
     INVALID_EMAIL("올바르지 않은 이메일 형식의 유저입니다.", "U_001"),
     INVALID_INTEREST_TYPE("관심사가 잘못되었습니다.", "U_002"),
-    NOT_FOUND_USER("존재하지 않는 회원입니다.", "U_003")
+    NOT_FOUND_USER("존재하지 않는 회원입니다.", "U_003"),
+    ALREADY_EXISTS_NICKNAME("이미 존재하는 닉네임입니다.", "U_004")
 }