diff --git a/src/main/java/econo/buddybridge/matching/entity/Matching.java b/src/main/java/econo/buddybridge/matching/entity/Matching.java
index 8e20f28..ae8b178 100644
--- a/src/main/java/econo/buddybridge/matching/entity/Matching.java
+++ b/src/main/java/econo/buddybridge/matching/entity/Matching.java
@@ -1,10 +1,13 @@
 package econo.buddybridge.matching.entity;
 
+import econo.buddybridge.chat.chatmessage.entity.ChatMessage;
 import econo.buddybridge.common.persistence.BaseEntity;
 import econo.buddybridge.member.entity.Member;
 import econo.buddybridge.post.entity.Post;
 import econo.buddybridge.post.entity.PostStatus;
 import jakarta.persistence.*;
+import java.util.ArrayList;
+import java.util.List;
 import lombok.AccessLevel;
 import lombok.Builder;
 import lombok.Getter;
@@ -37,6 +40,9 @@ public class Matching extends BaseEntity {
     @Enumerated(EnumType.STRING)
     private MatchingStatus matchingStatus;
 
+    @OneToMany(mappedBy = "matching", cascade = CascadeType.ALL, orphanRemoval = true)
+    private List<ChatMessage> chatMessages = new ArrayList<>();
+
     @Builder
     public Matching(Post post, Member taker, Member giver, MatchingStatus matchingStatus){
         this.post = post;
diff --git a/src/main/java/econo/buddybridge/post/entity/Post.java b/src/main/java/econo/buddybridge/post/entity/Post.java
index 4dad67c..6896b64 100644
--- a/src/main/java/econo/buddybridge/post/entity/Post.java
+++ b/src/main/java/econo/buddybridge/post/entity/Post.java
@@ -2,9 +2,11 @@
 
 
 import econo.buddybridge.common.persistence.BaseEntity;
+import econo.buddybridge.matching.entity.Matching;
 import econo.buddybridge.member.entity.DisabilityType;
 import econo.buddybridge.member.entity.Member;
 import econo.buddybridge.post.dto.PostReqDto;
+import jakarta.persistence.CascadeType;
 import jakarta.persistence.Column;
 import jakarta.persistence.Embedded;
 import jakarta.persistence.Entity;
@@ -17,7 +19,10 @@
 import jakarta.persistence.Id;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
 import jakarta.persistence.Table;
+import java.util.ArrayList;
+import java.util.List;
 import lombok.AccessLevel;
 import lombok.AllArgsConstructor;
 import lombok.Builder;
@@ -67,6 +72,9 @@ public class Post extends BaseEntity {
     @Enumerated(EnumType.STRING)
     private DisabilityType disabilityType;
 
+    @OneToMany(mappedBy = "post", orphanRemoval = true, cascade = CascadeType.ALL)
+    private final List<Matching> matchings = new ArrayList<>();
+
     public void changeStatus(PostStatus status){ // 상태 변경
         this.postStatus = status;
     }