diff --git a/dodam-core/src/main/java/b1nd/dodamcore/nightstudy/application/dto/req/RejectNightStudyReq.java b/dodam-core/src/main/java/b1nd/dodamcore/nightstudy/application/dto/req/RejectNightStudyReq.java
new file mode 100644
index 00000000..a3ccc5a4
--- /dev/null
+++ b/dodam-core/src/main/java/b1nd/dodamcore/nightstudy/application/dto/req/RejectNightStudyReq.java
@@ -0,0 +1,3 @@
+package b1nd.dodamcore.nightstudy.application.dto.req;
+
+public record RejectNightStudyReq(String rejectReason) {}
\ No newline at end of file
diff --git a/dodam-core/src/main/java/b1nd/dodamcore/nightstudy/application/dto/res/NightStudyRes.java b/dodam-core/src/main/java/b1nd/dodamcore/nightstudy/application/dto/res/NightStudyRes.java
index fb8c5c6c..1ba9da03 100644
--- a/dodam-core/src/main/java/b1nd/dodamcore/nightstudy/application/dto/res/NightStudyRes.java
+++ b/dodam-core/src/main/java/b1nd/dodamcore/nightstudy/application/dto/res/NightStudyRes.java
@@ -14,6 +14,7 @@ public record NightStudyRes(Long id,
                             Boolean doNeedPhone, String reasonForPhone,
                             StudentRes student,
                             String place,
+                            String rejectReason,
                             LocalDate startAt, LocalDate endAt,
                             LocalDateTime createdAt, LocalDateTime modifiedAt) {
     public static List<NightStudyRes> of(List<NightStudy> nightStudies) {
@@ -30,6 +31,7 @@ public static NightStudyRes of(NightStudy nightStudy) {
                 nightStudy.getDoNeedPhone(), nightStudy.getReasonForPhone(),
                 StudentRes.of(nightStudy.getStudent()),
                 nightStudy.getPlace().getPlace(),
+                nightStudy.getRejectReason(),
                 nightStudy.getStartAt(), nightStudy.getEndAt(),
                 nightStudy.getCreatedAt(), nightStudy.getModifiedAt()
         );
diff --git a/dodam-core/src/main/java/b1nd/dodamcore/outgoing/application/dto/req/RejectOutGoingReq.java b/dodam-core/src/main/java/b1nd/dodamcore/outgoing/application/dto/req/RejectOutGoingReq.java
new file mode 100644
index 00000000..97eb0798
--- /dev/null
+++ b/dodam-core/src/main/java/b1nd/dodamcore/outgoing/application/dto/req/RejectOutGoingReq.java
@@ -0,0 +1,3 @@
+package b1nd.dodamcore.outgoing.application.dto.req;
+
+public record RejectOutGoingReq(String rejectReason) {}
\ No newline at end of file
diff --git a/dodam-core/src/main/java/b1nd/dodamcore/outgoing/application/dto/res/OutGoingRes.java b/dodam-core/src/main/java/b1nd/dodamcore/outgoing/application/dto/res/OutGoingRes.java
index 113a052a..5ca70415 100644
--- a/dodam-core/src/main/java/b1nd/dodamcore/outgoing/application/dto/res/OutGoingRes.java
+++ b/dodam-core/src/main/java/b1nd/dodamcore/outgoing/application/dto/res/OutGoingRes.java
@@ -8,7 +8,7 @@
 import java.util.List;
 
 public record OutGoingRes(Long id, String reason, OutGoingStatus status, LocalDateTime startAt, LocalDateTime endAt,
-                          StudentRes student, LocalDateTime createdAt, LocalDateTime modifiedAt) {
+                          StudentRes student, String rejectReason, LocalDateTime createdAt, LocalDateTime modifiedAt) {
     public static List<OutGoingRes> of(List<OutGoing> oList) {
         return oList.stream()
                 .map(OutGoingRes::of)
@@ -23,6 +23,7 @@ public static OutGoingRes of(OutGoing o) {
                 o.getStartAt(),
                 o.getEndAt(),
                 StudentRes.of(o.getStudent()),
+                o.getRejectReason(),
                 o.getCreatedAt(),
                 o.getModifiedAt()
         );
diff --git a/dodam-core/src/main/java/b1nd/dodamcore/outsleeping/application/dto/req/RejectOutSleepingReq.java b/dodam-core/src/main/java/b1nd/dodamcore/outsleeping/application/dto/req/RejectOutSleepingReq.java
new file mode 100644
index 00000000..36ec78bc
--- /dev/null
+++ b/dodam-core/src/main/java/b1nd/dodamcore/outsleeping/application/dto/req/RejectOutSleepingReq.java
@@ -0,0 +1,3 @@
+package b1nd.dodamcore.outsleeping.application.dto.req;
+
+public record RejectOutSleepingReq(String rejectReason) {}
\ No newline at end of file
diff --git a/dodam-core/src/main/java/b1nd/dodamcore/outsleeping/application/dto/res/OutSleepingRes.java b/dodam-core/src/main/java/b1nd/dodamcore/outsleeping/application/dto/res/OutSleepingRes.java
index 58c2e18e..ee579845 100644
--- a/dodam-core/src/main/java/b1nd/dodamcore/outsleeping/application/dto/res/OutSleepingRes.java
+++ b/dodam-core/src/main/java/b1nd/dodamcore/outsleeping/application/dto/res/OutSleepingRes.java
@@ -15,6 +15,7 @@ public record OutSleepingRes(
         LocalDate startAt,
         LocalDate endAt,
         StudentRes student,
+        String rejectReason,
         LocalDateTime createdAt,
         LocalDateTime modifiedAt) {
     public static List<OutSleepingRes> of(List<OutSleeping> outSleepings) {
@@ -31,6 +32,7 @@ public static OutSleepingRes of(OutSleeping outSleeping) {
                 outSleeping.getStartAt(),
                 outSleeping.getEndAt(),
                 StudentRes.of(outSleeping.getStudent()),
+                outSleeping.getRejectReason(),
                 outSleeping.getCreatedAt(),
                 outSleeping.getModifiedAt()
         );