diff --git a/src/main/java/com/example/solidconnection/chat/domain/ChatAttachment.java b/src/main/java/com/example/solidconnection/chat/domain/ChatAttachment.java
new file mode 100644
index 000000000..5c0f5e651
--- /dev/null
+++ b/src/main/java/com/example/solidconnection/chat/domain/ChatAttachment.java
@@ -0,0 +1,35 @@
+package com.example.solidconnection.chat.domain;
+
+import com.example.solidconnection.common.BaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class ChatAttachment extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    private Boolean isImage;
+
+    @Column(nullable = false, length = 500)
+    private String url;
+
+    @Column(length = 500)
+    private String thumbnailUrl;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    private ChatMessage chatMessage;
+}
diff --git a/src/main/java/com/example/solidconnection/chat/domain/ChatMessage.java b/src/main/java/com/example/solidconnection/chat/domain/ChatMessage.java
new file mode 100644
index 000000000..8d513c5a7
--- /dev/null
+++ b/src/main/java/com/example/solidconnection/chat/domain/ChatMessage.java
@@ -0,0 +1,38 @@
+package com.example.solidconnection.chat.domain;
+
+import com.example.solidconnection.common.BaseEntity;
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
+import java.util.ArrayList;
+import java.util.List;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class ChatMessage extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false, length = 500)
+    private String content;
+
+    private long senderId;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    private ChatRoom chatRoom;
+
+    @OneToMany(mappedBy = "chatMessage", cascade = CascadeType.ALL)
+    private List<ChatAttachment> chatAttachments = new ArrayList<>();
+}
diff --git a/src/main/java/com/example/solidconnection/chat/domain/ChatParticipant.java b/src/main/java/com/example/solidconnection/chat/domain/ChatParticipant.java
new file mode 100644
index 000000000..169e1dd06
--- /dev/null
+++ b/src/main/java/com/example/solidconnection/chat/domain/ChatParticipant.java
@@ -0,0 +1,37 @@
+package com.example.solidconnection.chat.domain;
+
+import com.example.solidconnection.common.BaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import jakarta.persistence.UniqueConstraint;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@Table(uniqueConstraints = {
+        @UniqueConstraint(
+                name = "uk_chat_participant_chat_room_id_site_user_id",
+                columnNames = {"chat_room_id", "site_user_id"}
+        )
+})
+public class ChatParticipant extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "site_user_id")
+    private long siteUserId;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    private ChatRoom chatRoom;
+}
diff --git a/src/main/java/com/example/solidconnection/chat/domain/ChatReadStatus.java b/src/main/java/com/example/solidconnection/chat/domain/ChatReadStatus.java
new file mode 100644
index 000000000..13d4ac646
--- /dev/null
+++ b/src/main/java/com/example/solidconnection/chat/domain/ChatReadStatus.java
@@ -0,0 +1,35 @@
+package com.example.solidconnection.chat.domain;
+
+import com.example.solidconnection.common.BaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import jakarta.persistence.UniqueConstraint;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@Table(uniqueConstraints = {
+        @UniqueConstraint(
+                name = "uk_chat_read_status_chat_room_id_chat_participant_id",
+                columnNames = {"chat_room_id", "chat_participant_id"}
+        )
+})
+public class ChatReadStatus extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "chat_room_id")
+    private long chatRoomId;
+
+    @Column(name = "chat_participant_id")
+    private long chatParticipantId;
+}
diff --git a/src/main/java/com/example/solidconnection/chat/domain/ChatRoom.java b/src/main/java/com/example/solidconnection/chat/domain/ChatRoom.java
new file mode 100644
index 000000000..020befe5f
--- /dev/null
+++ b/src/main/java/com/example/solidconnection/chat/domain/ChatRoom.java
@@ -0,0 +1,32 @@
+package com.example.solidconnection.chat.domain;
+
+import com.example.solidconnection.common.BaseEntity;
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+import java.util.ArrayList;
+import java.util.List;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class ChatRoom extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    private boolean isGroup = false;
+
+    @OneToMany(mappedBy = "chatRoom", cascade = CascadeType.ALL)
+    private List<ChatParticipant> chatParticipants = new ArrayList<>();
+
+    @OneToMany(mappedBy = "chatRoom", cascade = CascadeType.ALL)
+    private List<ChatMessage> chatMessages = new ArrayList<>();
+}
diff --git a/src/main/resources/db/migration/V24__add_chat_related_tables.sql b/src/main/resources/db/migration/V24__add_chat_related_tables.sql
new file mode 100644
index 000000000..20898a147
--- /dev/null
+++ b/src/main/resources/db/migration/V24__add_chat_related_tables.sql
@@ -0,0 +1,55 @@
+CREATE TABLE chat_room
+(
+    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    is_group BOOLEAN NOT NULL DEFAULT false,
+    created_at DATETIME(6) NOT NULL,
+    updated_at DATETIME(6) NOT NULL
+);
+
+CREATE TABLE chat_participant
+(
+    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    site_user_id BIGINT NOT NULL,
+    chat_room_id BIGINT NOT NULL,
+    created_at DATETIME(6) NOT NULL,
+    updated_at DATETIME(6) NOT NULL,
+    CONSTRAINT FK_CHAT_PARTICIPANT_CHAT_ROOM_ID FOREIGN KEY (chat_room_id) REFERENCES chat_room (id),
+    CONSTRAINT FK_CHAT_PARTICIPANT_SITE_USER_ID FOREIGN KEY (site_user_id) REFERENCES site_user (id),
+    CONSTRAINT UK_CHAT_PARTICIPANT_CHAT_ROOM_ID_SITE_USER_ID UNIQUE (chat_room_id, site_user_id)
+);
+
+CREATE TABLE chat_message
+(
+    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    content VARCHAR(500) NOT NULL,
+    sender_id BIGINT NOT NULL,
+    chat_room_id BIGINT NOT NULL,
+    created_at DATETIME(6) NOT NULL,
+    updated_at DATETIME(6) NOT NULL,
+    CONSTRAINT FK_CHAT_MESSAGE_CHAT_ROOM_ID FOREIGN KEY (chat_room_id) REFERENCES chat_room (id),
+    CONSTRAINT FK_CHAT_MESSAGE_SENDER_ID FOREIGN KEY (sender_id) REFERENCES chat_participant (id)
+);
+
+CREATE TABLE chat_attachment
+(
+    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    is_image BOOLEAN NOT NULL,
+    url VARCHAR(500) NOT NULL,
+    thumbnail_url VARCHAR(500),
+    chat_message_id BIGINT NOT NULL,
+    created_at DATETIME(6) NOT NULL,
+    updated_at DATETIME(6) NOT NULL,
+    CONSTRAINT FK_CHAT_ATTACHMENT_CHAT_MESSAGE_ID FOREIGN KEY (chat_message_id) REFERENCES chat_message (id)
+);
+
+CREATE TABLE chat_read_status
+(
+    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    chat_room_id BIGINT NOT NULL,
+    chat_participant_id BIGINT NOT NULL,
+    created_at DATETIME(6) NOT NULL,
+    updated_at DATETIME(6) NOT NULL,
+    CONSTRAINT FK_CHAT_READ_STATUS_CHAT_ROOM_ID FOREIGN KEY (chat_room_id) REFERENCES chat_room (id),
+    CONSTRAINT FK_CHAT_READ_STATUS_CHAT_PARTICIPANT_ID FOREIGN KEY (chat_participant_id) REFERENCES chat_participant (id),
+    CONSTRAINT UK_CHAT_READ_STATUS_CHAT_ROOM_ID_CHAT_PARTICIPANT_ID UNIQUE (chat_room_id, chat_participant_id)
+);