diff --git a/api/src/main/java/hexagonal/api/chat/application/port/out/FindChatPort.java b/api/src/main/java/hexagonal/api/chat/application/port/out/FindChatPort.java
new file mode 100644
index 0000000..61d517b
--- /dev/null
+++ b/api/src/main/java/hexagonal/api/chat/application/port/out/FindChatPort.java
@@ -0,0 +1,10 @@
+package hexagonal.api.chat.application.port.out;
+
+import hexagonal.core.domain.jpa.ChatJpaEntity;
+
+import java.util.List;
+
+public interface FindChatPort {
+    List<ChatJpaEntity> findChatByRoom(Long roomId);
+
+}
diff --git a/api/src/main/java/hexagonal/api/chat/application/port/out/SaveChatPort.java b/api/src/main/java/hexagonal/api/chat/application/port/out/SaveChatPort.java
new file mode 100644
index 0000000..c8f6316
--- /dev/null
+++ b/api/src/main/java/hexagonal/api/chat/application/port/out/SaveChatPort.java
@@ -0,0 +1,8 @@
+package hexagonal.api.chat.application.port.out;
+
+import hexagonal.core.domain.jpa.ChatJpaEntity;
+
+public interface SaveChatPort {
+    Long saveChat(ChatJpaEntity entity);
+
+}
diff --git a/core/src/main/java/hexagonal/core/domain/Message.java b/core/src/main/java/hexagonal/core/domain/Chat.java
similarity index 91%
rename from core/src/main/java/hexagonal/core/domain/Message.java
rename to core/src/main/java/hexagonal/core/domain/Chat.java
index ece6c55..68abe23 100644
--- a/core/src/main/java/hexagonal/core/domain/Message.java
+++ b/core/src/main/java/hexagonal/core/domain/Chat.java
@@ -6,7 +6,7 @@
 @Builder
 @AllArgsConstructor
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-public class Message {
+public class Chat {
 
     private Long id;
     private String content;
diff --git a/core/src/main/java/hexagonal/core/domain/jpa/ChatJpaEntity.java b/core/src/main/java/hexagonal/core/domain/jpa/ChatJpaEntity.java
new file mode 100644
index 0000000..33f6ebf
--- /dev/null
+++ b/core/src/main/java/hexagonal/core/domain/jpa/ChatJpaEntity.java
@@ -0,0 +1,30 @@
+package hexagonal.core.domain.jpa;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.*;
+
+@Entity
+@Table(name = "chat")
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class ChatJpaEntity {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Column
+    private String content;
+
+    @Column
+    private Long senderId;
+
+    @Column
+    private Long roomId;
+}
diff --git a/core/src/main/java/hexagonal/core/repository/ChatRepository.java b/core/src/main/java/hexagonal/core/repository/ChatRepository.java
new file mode 100644
index 0000000..4f9c1ff
--- /dev/null
+++ b/core/src/main/java/hexagonal/core/repository/ChatRepository.java
@@ -0,0 +1,10 @@
+package hexagonal.core.repository;
+
+import hexagonal.core.domain.jpa.ChatJpaEntity;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface ChatRepository extends JpaRepository<ChatJpaEntity, Long> {
+
+}