diff --git a/back/src/main/kotlin/knu/dong/onedayonebaek/user/controller/UserController.kt b/back/src/main/kotlin/knu/dong/onedayonebaek/user/controller/UserController.kt
index bb003bd..e328d97 100644
--- a/back/src/main/kotlin/knu/dong/onedayonebaek/user/controller/UserController.kt
+++ b/back/src/main/kotlin/knu/dong/onedayonebaek/user/controller/UserController.kt
@@ -1,6 +1,13 @@
 package knu.dong.onedayonebaek.user.controller
 
+import io.swagger.v3.oas.annotations.Operation
+import io.swagger.v3.oas.annotations.media.Content
+import io.swagger.v3.oas.annotations.media.ExampleObject
+import io.swagger.v3.oas.annotations.media.Schema
+import io.swagger.v3.oas.annotations.responses.ApiResponse
+import io.swagger.v3.oas.annotations.responses.ApiResponses
 import io.swagger.v3.oas.annotations.tags.Tag
+import knu.dong.onedayonebaek.common.exception.response.UnauthorizedResponse
 import knu.dong.onedayonebaek.user.domain.User
 import knu.dong.onedayonebaek.user.dto.toUserDto
 import org.springframework.security.core.Authentication
@@ -13,6 +20,22 @@ import org.springframework.web.bind.annotation.RestController
 @Tag(name = "User APIs", description = "유저 정보와 관련된 APIs")
 class UserController {
 
+    @Operation(
+        summary = "로그인된 유저의 정보 조회",
+        description = "로그인된 유저의 정보를 조회한다."
+    )
+    @ApiResponses(
+        ApiResponse(responseCode = "200", description = "로그인된 유저 정보"),
+        ApiResponse(
+            responseCode = "401", description = "로그인 되지 않음",
+            content = [Content(
+                examples = [ExampleObject(
+                    name = "로그인 되지 않음",
+                    value = "{\"code\": \"access_token_expired\", \"message\":\"Access token expired\"}"
+                )],
+                schema = Schema(implementation = UnauthorizedResponse::class))],
+        )
+    )
     @GetMapping
     fun loginUserInfo(authentication: Authentication) = (authentication.principal as User).toUserDto()
 }
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