diff --git a/backend/src/main/java/com/twtw/backend/config/security/SecurityConfig.java b/backend/src/main/java/com/twtw/backend/config/security/SecurityConfig.java
index 9c8fef60..85d439d8 100644
--- a/backend/src/main/java/com/twtw/backend/config/security/SecurityConfig.java
+++ b/backend/src/main/java/com/twtw/backend/config/security/SecurityConfig.java
@@ -36,7 +36,8 @@ public SecurityFilterChain configure(HttpSecurity http) throws Exception {
                                                 "/swagger-ui.html",
                                                 "auth/refresh",
                                                 "auth/save",
-                                                "auth/login")
+                                                "auth/login",
+                                                "member/duplicate/**")
                                         .permitAll())
                 .authorizeHttpRequests(
                         x -> x.requestMatchers("/test/**").permitAll().anyRequest().authenticated())
diff --git a/backend/src/main/java/com/twtw/backend/domain/group/controller/GroupController.java b/backend/src/main/java/com/twtw/backend/domain/group/controller/GroupController.java
new file mode 100644
index 00000000..4a529814
--- /dev/null
+++ b/backend/src/main/java/com/twtw/backend/domain/group/controller/GroupController.java
@@ -0,0 +1,16 @@
+package com.twtw.backend.domain.group.controller;
+
+import com.twtw.backend.domain.group.service.GroupService;
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/group")
+public class GroupController {
+    private final GroupService groupService;
+
+    public GroupController(GroupService groupService) {
+        this.groupService = groupService;
+    }
+}
diff --git a/backend/src/main/java/com/twtw/backend/domain/group/entity/Group.java b/backend/src/main/java/com/twtw/backend/domain/group/entity/Group.java
new file mode 100644
index 00000000..b7c80de0
--- /dev/null
+++ b/backend/src/main/java/com/twtw/backend/domain/group/entity/Group.java
@@ -0,0 +1,27 @@
+package com.twtw.backend.domain.group.entity;
+
+import jakarta.persistence.*;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Group {
+    @Id
+    @GeneratedValue(generator = "uuid2")
+    @Column(name = "id", columnDefinition = "BINARY(16)")
+    private UUID id;
+
+    private String name;
+    private String groupImage;
+
+    @OneToMany(mappedBy = "group")
+    private List<GroupMember> groupMembers = new ArrayList<>();
+}
diff --git a/backend/src/main/java/com/twtw/backend/domain/group/entity/GroupMember.java b/backend/src/main/java/com/twtw/backend/domain/group/entity/GroupMember.java
new file mode 100644
index 00000000..c635dea5
--- /dev/null
+++ b/backend/src/main/java/com/twtw/backend/domain/group/entity/GroupMember.java
@@ -0,0 +1,29 @@
+package com.twtw.backend.domain.group.entity;
+
+import com.twtw.backend.domain.member.entity.Member;
+
+import jakarta.persistence.*;
+
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.UUID;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class GroupMember {
+    @Id
+    @GeneratedValue(generator = "uuid2")
+    @Column(name = "id", columnDefinition = "BINARY(16)")
+    private UUID id;
+
+    @ManyToOne
+    @JoinColumn(name = "group_id")
+    private Group group;
+
+    @ManyToOne
+    @JoinColumn(name = "member_id")
+    private Member member;
+}
diff --git a/backend/src/main/java/com/twtw/backend/domain/group/repository/GroupMemberRepository.java b/backend/src/main/java/com/twtw/backend/domain/group/repository/GroupMemberRepository.java
new file mode 100644
index 00000000..5b242778
--- /dev/null
+++ b/backend/src/main/java/com/twtw/backend/domain/group/repository/GroupMemberRepository.java
@@ -0,0 +1,9 @@
+package com.twtw.backend.domain.group.repository;
+
+import com.twtw.backend.domain.group.entity.GroupMember;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.UUID;
+
+public interface GroupMemberRepository extends JpaRepository<GroupMember, UUID> {}
diff --git a/backend/src/main/java/com/twtw/backend/domain/group/repository/GroupRepository.java b/backend/src/main/java/com/twtw/backend/domain/group/repository/GroupRepository.java
new file mode 100644
index 00000000..7860acab
--- /dev/null
+++ b/backend/src/main/java/com/twtw/backend/domain/group/repository/GroupRepository.java
@@ -0,0 +1,9 @@
+package com.twtw.backend.domain.group.repository;
+
+import com.twtw.backend.domain.group.entity.Group;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import java.util.UUID;
+
+public interface GroupRepository extends JpaRepository<Group, UUID> {}
diff --git a/backend/src/main/java/com/twtw/backend/domain/group/service/GroupService.java b/backend/src/main/java/com/twtw/backend/domain/group/service/GroupService.java
new file mode 100644
index 00000000..147e2f2a
--- /dev/null
+++ b/backend/src/main/java/com/twtw/backend/domain/group/service/GroupService.java
@@ -0,0 +1,14 @@
+package com.twtw.backend.domain.group.service;
+
+import com.twtw.backend.domain.group.repository.GroupRepository;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class GroupService {
+    private final GroupRepository groupRepository;
+
+    public GroupService(GroupRepository groupRepository) {
+        this.groupRepository = groupRepository;
+    }
+}
diff --git a/backend/src/main/java/com/twtw/backend/domain/member/entity/Member.java b/backend/src/main/java/com/twtw/backend/domain/member/entity/Member.java
index 8aa6041f..4654903d 100644
--- a/backend/src/main/java/com/twtw/backend/domain/member/entity/Member.java
+++ b/backend/src/main/java/com/twtw/backend/domain/member/entity/Member.java
@@ -1,11 +1,15 @@
 package com.twtw.backend.domain.member.entity;
 
+import com.twtw.backend.domain.group.entity.GroupMember;
+
 import jakarta.persistence.*;
 
 import lombok.AccessLevel;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.UUID;
 
 @Entity
@@ -26,6 +30,9 @@ public class Member {
 
     @Embedded private OAuth2Info oAuth2Info;
 
+    @OneToMany(mappedBy = "member")
+    private List<GroupMember> groupMembers = new ArrayList<>();
+
     public Member(String nickname, String profileImage) {
         this.nickname = nickname;
         this.profileImage = profileImage;