diff --git a/src/main/kotlin/com/depromeet/makers/domain/usecase/CheckInSession.kt b/src/main/kotlin/com/depromeet/makers/domain/usecase/CheckInSession.kt
index ba3a5d7..88b8043 100644
--- a/src/main/kotlin/com/depromeet/makers/domain/usecase/CheckInSession.kt
+++ b/src/main/kotlin/com/depromeet/makers/domain/usecase/CheckInSession.kt
@@ -15,7 +15,7 @@ class CheckInSession(
     private val attendanceGateway: AttendanceGateway,
     private val sessionGateway: SessionGateway,
     private val memberGateway: MemberGateway,
-) : UseCase<CheckInSession.CheckInSessionInput, Unit> {
+) : UseCase<CheckInSession.CheckInSessionInput, Attendance> {
     data class CheckInSessionInput(
         val now: LocalDateTime,
         val memberId: String,
@@ -23,7 +23,7 @@ class CheckInSession(
         val latitude: Double?,
     )
 
-    override fun execute(input: CheckInSessionInput) {
+    override fun execute(input: CheckInSessionInput): Attendance {
         val member = memberGateway.getById(input.memberId)
         val monday = input.now.getMonday()
 
@@ -64,7 +64,7 @@ class CheckInSession(
             }
         }
 
-        attendanceGateway.save(attendance.checkIn(input.now, thisWeekSession.startTime))
+        return attendanceGateway.save(attendance.checkIn(input.now, thisWeekSession.startTime))
     }
 
     private fun LocalDateTime.getMonday() = this.toLocalDate().with(DayOfWeek.MONDAY).atStartOfDay()
diff --git a/src/main/kotlin/com/depromeet/makers/presentation/restapi/controller/CheckInController.kt b/src/main/kotlin/com/depromeet/makers/presentation/restapi/controller/CheckInController.kt
index f463b1a..faf0fd3 100644
--- a/src/main/kotlin/com/depromeet/makers/presentation/restapi/controller/CheckInController.kt
+++ b/src/main/kotlin/com/depromeet/makers/presentation/restapi/controller/CheckInController.kt
@@ -2,10 +2,9 @@ package com.depromeet.makers.presentation.restapi.controller
 
 import com.depromeet.makers.domain.usecase.CheckInSession
 import com.depromeet.makers.domain.usecase.GetCheckInStatus
+import com.depromeet.makers.presentation.restapi.dto.response.AttendanceResponse
 import com.depromeet.makers.presentation.restapi.dto.response.CheckInStatusResponse
 import io.swagger.v3.oas.annotations.Operation
-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 org.springframework.security.core.Authentication
 import org.springframework.web.bind.annotation.GetMapping
@@ -25,26 +24,19 @@ class CheckInController(
 
     @Operation(summary = "세션 출석", description = "세션에 출석합니다. (서버에서 현재 시간을 기준으로 출석 처리)")
     @PostMapping
-    @ApiResponses(
-        ApiResponse(responseCode = "200", description = "출석 성공"),
-        ApiResponse(responseCode = "AT0001", description = "출석 시간 이전입니다"),
-        ApiResponse(responseCode = "AT0002", description = "출석 시간이 지났습니다"),
-        ApiResponse(responseCode = "AT0003", description = "이미 출석했습니다"),
-        ApiResponse(responseCode = "AT0004", description = "현재 주차에 해당하는 세션을 찾을 수 없습니다."),
-        ApiResponse(responseCode = "AT0005", description = "현재 위치 파라미터가 누락되었습니다."),
-        ApiResponse(responseCode = "AT0006", description = "현재 위치와 세션 장소의 거리가 너무 멉니다."),
-    )
     fun checkInSession(
         authentication: Authentication,
         @RequestParam("latitude", required = false) latitude: Double?,
         @RequestParam("longitude", required = false) longitude: Double?,
-    ) {
-        checkInSession.execute(
-            CheckInSession.CheckInSessionInput(
-                now = LocalDateTime.now(),
-                memberId = authentication.name,
-                latitude = latitude,
-                longitude = longitude,
+    ): AttendanceResponse {
+        return AttendanceResponse.fromDomain(
+            checkInSession.execute(
+                CheckInSession.CheckInSessionInput(
+                    now = LocalDateTime.now(),
+                    memberId = authentication.name,
+                    latitude = latitude,
+                    longitude = longitude,
+                )
             )
         )
     }