diff --git a/core/src/main/java/hexagonal/core/domain/Room.java b/core/src/main/java/hexagonal/core/domain/Room.java
new file mode 100644
index 0000000..4cb61f5
--- /dev/null
+++ b/core/src/main/java/hexagonal/core/domain/Room.java
@@ -0,0 +1,23 @@
+package hexagonal.core.domain;
+
+import lombok.*;
+
+import javax.persistence.*;
+
+@Getter
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@Entity
+public class Room {
+
+    @Id
+    @GeneratedValue(strategy =  GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(nullable = false)
+    private Long companyId;
+
+    @Column(nullable = false)
+    private Long adminId;
+}
diff --git a/core/src/main/java/hexagonal/core/domain/jpa/RoomJpaEntity.java b/core/src/main/java/hexagonal/core/domain/jpa/RoomJpaEntity.java
new file mode 100644
index 0000000..0aee477
--- /dev/null
+++ b/core/src/main/java/hexagonal/core/domain/jpa/RoomJpaEntity.java
@@ -0,0 +1,28 @@
+package hexagonal.core.domain.jpa;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.*;
+
+@Entity
+@Table(name = "room")
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class RoomJpaEntity {
+
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Column
+    private Long companyId;
+
+    @Column
+    private Long adminId;
+
+}
diff --git a/core/src/main/java/hexagonal/core/repository/RoomRepository.java b/core/src/main/java/hexagonal/core/repository/RoomRepository.java
new file mode 100644
index 0000000..c18a18f
--- /dev/null
+++ b/core/src/main/java/hexagonal/core/repository/RoomRepository.java
@@ -0,0 +1,12 @@
+package hexagonal.core.repository;
+
+import hexagonal.core.domain.jpa.RoomJpaEntity;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import java.util.Optional;
+
+@Repository
+public interface RoomRepository extends JpaRepository<RoomJpaEntity, Long> {
+    Optional<RoomJpaEntity> findByCompanyId(Long companyId);
+}