diff --git a/src/main/java/flipnote/group/adapter/in/web/GroupController.java b/src/main/java/flipnote/group/adapter/in/web/GroupController.java
index 4972362..5eabf88 100644
--- a/src/main/java/flipnote/group/adapter/in/web/GroupController.java
+++ b/src/main/java/flipnote/group/adapter/in/web/GroupController.java
@@ -1,15 +1,21 @@
 package flipnote.group.adapter.in.web;
 
 import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestHeader;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import flipnote.group.api.dto.request.ChangeGroupRequestDto;
 import flipnote.group.api.dto.request.CreateGroupRequestDto;
+import flipnote.group.api.dto.response.ChangeGroupResponseDto;
 import flipnote.group.api.dto.response.CreateGroupResponseDto;
+import flipnote.group.application.port.in.ChangeGroupUseCase;
 import flipnote.group.application.port.in.CreateGroupUseCase;
+import flipnote.group.application.port.in.command.ChangeGroupCommand;
 import flipnote.group.application.port.in.command.CreateGroupCommand;
 import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
@@ -20,6 +26,7 @@
 public class GroupController {
 
 	private final CreateGroupUseCase createGroupUseCase;
+	private final ChangeGroupUseCase changeGroupUseCase;
 
 	/**
 	 * 그룹 생성 API
@@ -33,6 +40,7 @@ public ResponseEntity<CreateGroupResponseDto> createGroup(
 	    @RequestBody @Valid CreateGroupRequestDto req) {
 
 		CreateGroupCommand cmd = new CreateGroupCommand(
+			userId,
 			req.name(),
 			req.category(),
 			req.description(),
@@ -42,9 +50,40 @@ public ResponseEntity<CreateGroupResponseDto> createGroup(
 			req.imageRefId()
 		);
 
-		var result = createGroupUseCase.create(cmd, userId);
+		var result = createGroupUseCase.create(cmd);
 		CreateGroupResponseDto res = CreateGroupResponseDto.from(result.groupId());
 		return ResponseEntity.ok(res);
 	}
 
+	/**
+	 * 그룹 수정 API
+	 * @param userId
+	 * @param groupId
+	 * @param req
+	 * @return
+	 */
+	@PutMapping("/{groupId}")
+	public ResponseEntity<ChangeGroupResponseDto> changeGroup(
+		@RequestHeader("X-USER-ID") Long userId,
+		@PathVariable Long groupId,
+		@RequestBody @Valid ChangeGroupRequestDto req) {
+
+		ChangeGroupCommand cmd = new ChangeGroupCommand(
+			groupId,
+			userId,
+			req.name(),
+			req.category(),
+			req.description(),
+			req.joinPolicy(),
+			req.visibility(),
+			req.maxMember(),
+			req.imageRefId()
+		);
+
+		var result = changeGroupUseCase.change(cmd);
+
+		ChangeGroupResponseDto res = ChangeGroupResponseDto.from(result);
+		return ResponseEntity.ok(res);
+	}
+
 }
diff --git a/src/main/java/flipnote/group/adapter/out/entity/GroupEntity.java b/src/main/java/flipnote/group/adapter/out/entity/GroupEntity.java
index c3e9968..e2650d7 100644
--- a/src/main/java/flipnote/group/adapter/out/entity/GroupEntity.java
+++ b/src/main/java/flipnote/group/adapter/out/entity/GroupEntity.java
@@ -1,5 +1,6 @@
 package flipnote.group.adapter.out.entity;
 
+import flipnote.group.application.port.in.command.ChangeGroupCommand;
 import flipnote.group.application.port.in.command.CreateGroupCommand;
 import flipnote.group.domain.model.BaseEntity;
 import flipnote.group.domain.model.group.Category;
@@ -66,4 +67,20 @@ private GroupEntity(String name, Category category, String description, JoinPoli
 		this.imageRefId = imageRefId;
 		this.memberCount = memberCount;
 	}
+
+	/**
+	 * 업데이트
+	 * @param cmd
+	 */
+	public void change(
+		ChangeGroupCommand cmd
+	) {
+		this.name = cmd.name();
+		this.category = cmd.category();
+		this.description = cmd.description();
+		this.joinPolicy = cmd.joinPolicy();
+		this.visibility = cmd.visibility();
+		this.maxMember = cmd.maxMember();
+		this.imageRefId = cmd.imageRefId();
+	}
 }
diff --git a/src/main/java/flipnote/group/adapter/out/persistence/GroupRepositoryAdapter.java b/src/main/java/flipnote/group/adapter/out/persistence/GroupRepositoryAdapter.java
index 63d3372..a9bf8c8 100644
--- a/src/main/java/flipnote/group/adapter/out/persistence/GroupRepositoryAdapter.java
+++ b/src/main/java/flipnote/group/adapter/out/persistence/GroupRepositoryAdapter.java
@@ -1,5 +1,7 @@
 package flipnote.group.adapter.out.persistence;
 
+import java.util.Optional;
+
 import org.springframework.stereotype.Repository;
 
 import flipnote.group.adapter.out.entity.GroupEntity;
@@ -15,9 +17,47 @@ public class GroupRepositoryAdapter implements GroupRepositoryPort {
 
 	private final GroupRepository groupRepository;
 
+	/**
+	 * 그룹 저장
+	 * @param group
+	 * @return
+	 */
 	@Override
 	public Long saveNewGroup(Group group) {
 		GroupEntity entity = GroupMapper.createNewEntity(group);
 		return groupRepository.save(entity).getId();
 	}
+
+	@Override
+	public Group findById(Long id) {
+		GroupEntity groupEntity = groupRepository.findById(id).orElseThrow(
+			() -> new IllegalArgumentException("Group not Exist")
+		);
+		return GroupMapper.toDomain(groupEntity);
+	}
+
+	/**
+	 * 그룹 수정
+	 * @param group
+	 */
+	@Override
+	public Group update(Group group) {
+
+		GroupEntity groupEntity = groupRepository.findById(group.getId()).orElseThrow(
+			() -> new IllegalArgumentException("group not Exist")
+		);
+
+		groupEntity.change(
+			group.getName(),
+			group.getCategory(),
+			group.getDescription(),
+			group.getJoinPolicy(),
+			group.getVisibility(),
+			group.getMaxMember(),
+			group.getImageRefId()
+		);
+
+		return GroupMapper.toDomain(groupEntity);
+	}
+
 }
diff --git a/src/main/java/flipnote/group/adapter/out/persistence/mapper/GroupMapper.java b/src/main/java/flipnote/group/adapter/out/persistence/mapper/GroupMapper.java
index c89f7f0..77d472e 100644
--- a/src/main/java/flipnote/group/adapter/out/persistence/mapper/GroupMapper.java
+++ b/src/main/java/flipnote/group/adapter/out/persistence/mapper/GroupMapper.java
@@ -28,4 +28,25 @@ public static GroupEntity createNewEntity(Group domain) {
 			.memberCount(domain.getMemberCount())
 			.build();
 	}
+
+	/**
+	 * 엔티티 -> 도메인
+	 * @param e
+	 * @return
+	 */
+	public static Group toDomain(GroupEntity e) {
+		return Group.restore(
+			e.getId(),
+			e.getName(),
+			e.getCategory(),
+			e.getDescription(),
+			e.getJoinPolicy(),
+			e.getVisibility(),
+			e.getMaxMember(),
+			e.getImageRefId(),
+			e.getMemberCount(),
+			e.getCreatedAt(),
+			e.getModifiedAt()
+		);
+	}
 }
diff --git a/src/main/java/flipnote/group/api/dto/request/ChangeGroupRequestDto.java b/src/main/java/flipnote/group/api/dto/request/ChangeGroupRequestDto.java
new file mode 100644
index 0000000..c95c330
--- /dev/null
+++ b/src/main/java/flipnote/group/api/dto/request/ChangeGroupRequestDto.java
@@ -0,0 +1,20 @@
+package flipnote.group.api.dto.request;
+
+import flipnote.group.domain.model.group.Category;
+import flipnote.group.domain.model.group.JoinPolicy;
+import flipnote.group.domain.model.group.Visibility;
+import jakarta.validation.constraints.Max;
+import jakarta.validation.constraints.Min;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+
+public record ChangeGroupRequestDto(
+	@NotBlank String name,
+	@NotNull Category category,
+	@NotBlank String description,
+	@NotNull JoinPolicy joinPolicy,
+	@NotNull Visibility visibility,
+	@NotNull @Min(1) @Max(100) Integer maxMember,
+	Long imageRefId
+) {
+}
diff --git a/src/main/java/flipnote/group/api/dto/response/ChangeGroupResponseDto.java b/src/main/java/flipnote/group/api/dto/response/ChangeGroupResponseDto.java
new file mode 100644
index 0000000..add99f9
--- /dev/null
+++ b/src/main/java/flipnote/group/api/dto/response/ChangeGroupResponseDto.java
@@ -0,0 +1,46 @@
+package flipnote.group.api.dto.response;
+
+import java.time.LocalDateTime;
+
+import flipnote.group.application.port.in.result.ChangeGroupResult;
+import flipnote.group.domain.model.group.Category;
+import flipnote.group.domain.model.group.Group;
+import flipnote.group.domain.model.group.JoinPolicy;
+import flipnote.group.domain.model.group.Visibility;
+
+public record ChangeGroupResponseDto(
+	String name,
+
+	Category category,
+
+	String description,
+
+	JoinPolicy joinPolicy,
+
+	Visibility visibility,
+
+	Integer maxMember,
+
+	Long imageRefId,
+
+	LocalDateTime createdAt,
+
+	LocalDateTime modifiedAt
+) {
+	public static ChangeGroupResponseDto from(ChangeGroupResult result) {
+
+		Group group = result.group();
+
+		return new ChangeGroupResponseDto(
+			group.getName(),
+			group.getCategory(),
+			group.getDescription(),
+			group.getJoinPolicy(),
+			group.getVisibility(),
+			group.getMaxMember(),
+			group.getImageRefId(),
+			group.getCreatedAt(),
+			group.getModifiedAt()
+		);
+	}
+}
diff --git a/src/main/java/flipnote/group/application/port/in/ChangeGroupUseCase.java b/src/main/java/flipnote/group/application/port/in/ChangeGroupUseCase.java
new file mode 100644
index 0000000..fc6f38f
--- /dev/null
+++ b/src/main/java/flipnote/group/application/port/in/ChangeGroupUseCase.java
@@ -0,0 +1,8 @@
+package flipnote.group.application.port.in;
+
+import flipnote.group.application.port.in.command.ChangeGroupCommand;
+import flipnote.group.application.port.in.result.ChangeGroupResult;
+
+public interface ChangeGroupUseCase {
+	ChangeGroupResult change(ChangeGroupCommand cmd);
+}
diff --git a/src/main/java/flipnote/group/application/port/in/CreateGroupUseCase.java b/src/main/java/flipnote/group/application/port/in/CreateGroupUseCase.java
index d58a135..c670d61 100644
--- a/src/main/java/flipnote/group/application/port/in/CreateGroupUseCase.java
+++ b/src/main/java/flipnote/group/application/port/in/CreateGroupUseCase.java
@@ -4,5 +4,5 @@
 import flipnote.group.application.port.in.result.CreateGroupResult;
 
 public interface CreateGroupUseCase {
-	CreateGroupResult create(CreateGroupCommand cmd, Long userId);
+	CreateGroupResult create(CreateGroupCommand cmd);
 }
diff --git a/src/main/java/flipnote/group/application/port/in/command/ChangeGroupCommand.java b/src/main/java/flipnote/group/application/port/in/command/ChangeGroupCommand.java
new file mode 100644
index 0000000..c7cc7ba
--- /dev/null
+++ b/src/main/java/flipnote/group/application/port/in/command/ChangeGroupCommand.java
@@ -0,0 +1,19 @@
+package flipnote.group.application.port.in.command;
+
+import flipnote.group.domain.model.group.Category;
+import flipnote.group.domain.model.group.JoinPolicy;
+import flipnote.group.domain.model.group.Visibility;
+
+public record ChangeGroupCommand(
+	Long groupId,
+	Long userId,
+	String name,
+	Category category,
+	String description,
+	JoinPolicy joinPolicy,
+	Visibility visibility,
+	int maxMember,
+	Long imageRefId
+) {
+
+}
diff --git a/src/main/java/flipnote/group/application/port/in/command/CreateGroupCommand.java b/src/main/java/flipnote/group/application/port/in/command/CreateGroupCommand.java
index 40a2f58..f12640f 100644
--- a/src/main/java/flipnote/group/application/port/in/command/CreateGroupCommand.java
+++ b/src/main/java/flipnote/group/application/port/in/command/CreateGroupCommand.java
@@ -5,6 +5,7 @@
 import flipnote.group.domain.model.group.Visibility;
 
 public record CreateGroupCommand(
+	Long userId,
 	String name,
 	Category category,
 	String description,
diff --git a/src/main/java/flipnote/group/application/port/in/result/ChangeGroupResult.java b/src/main/java/flipnote/group/application/port/in/result/ChangeGroupResult.java
new file mode 100644
index 0000000..32b2499
--- /dev/null
+++ b/src/main/java/flipnote/group/application/port/in/result/ChangeGroupResult.java
@@ -0,0 +1,8 @@
+package flipnote.group.application.port.in.result;
+
+import flipnote.group.domain.model.group.Group;
+
+public record ChangeGroupResult(
+	Group group
+) {
+}
diff --git a/src/main/java/flipnote/group/application/port/out/GroupMemberRepositoryPort.java b/src/main/java/flipnote/group/application/port/out/GroupMemberRepositoryPort.java
index 8622b41..5858851 100644
--- a/src/main/java/flipnote/group/application/port/out/GroupMemberRepositoryPort.java
+++ b/src/main/java/flipnote/group/application/port/out/GroupMemberRepositoryPort.java
@@ -1,7 +1,5 @@
 package flipnote.group.application.port.out;
 
-import flipnote.group.domain.model.member.GroupMemberRole;
-
 public interface GroupMemberRepositoryPort {
     void saveOwner(Long groupId, Long userId);
 }
diff --git a/src/main/java/flipnote/group/application/port/out/GroupRepositoryPort.java b/src/main/java/flipnote/group/application/port/out/GroupRepositoryPort.java
index b1a2f7c..5bc40cf 100644
--- a/src/main/java/flipnote/group/application/port/out/GroupRepositoryPort.java
+++ b/src/main/java/flipnote/group/application/port/out/GroupRepositoryPort.java
@@ -4,4 +4,8 @@
 
 public interface GroupRepositoryPort {
     Long saveNewGroup(Group group);
+
+    Group findById(Long id);
+
+    Group update(Group group);
 }
diff --git a/src/main/java/flipnote/group/application/service/ChangeGroupService.java b/src/main/java/flipnote/group/application/service/ChangeGroupService.java
new file mode 100644
index 0000000..f42fab6
--- /dev/null
+++ b/src/main/java/flipnote/group/application/service/ChangeGroupService.java
@@ -0,0 +1,41 @@
+package flipnote.group.application.service;
+
+import java.util.Optional;
+
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import flipnote.group.adapter.out.entity.GroupEntity;
+import flipnote.group.adapter.out.persistence.mapper.GroupMapper;
+import flipnote.group.application.port.in.ChangeGroupUseCase;
+import flipnote.group.application.port.in.command.ChangeGroupCommand;
+import flipnote.group.application.port.in.result.ChangeGroupResult;
+import flipnote.group.application.port.out.GroupRepositoryPort;
+import flipnote.group.domain.model.group.Group;
+import flipnote.group.infrastructure.persistence.jpa.GroupRepository;
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+public class ChangeGroupService implements ChangeGroupUseCase {
+
+	private final GroupRepository jpaGroupRepository;
+
+	/**
+	 * 그룹 수정
+	 * @param cmd
+	 * @return
+	 */
+	@Override
+	@Transactional
+	public ChangeGroupResult change(ChangeGroupCommand cmd) {
+
+		GroupEntity entity = jpaGroupRepository.findById(cmd.groupId()).orElseThrow(
+			() -> new IllegalArgumentException("group not Exists")
+		);
+
+		entity.change(cmd);
+
+		return new ChangeGroupResult(GroupMapper.toDomain(entity));
+	}
+}
diff --git a/src/main/java/flipnote/group/application/service/CreateGroupService.java b/src/main/java/flipnote/group/application/service/CreateGroupService.java
index 5ad6e36..88bd774 100644
--- a/src/main/java/flipnote/group/application/service/CreateGroupService.java
+++ b/src/main/java/flipnote/group/application/service/CreateGroupService.java
@@ -22,12 +22,11 @@ public class CreateGroupService implements CreateGroupUseCase {
 	/**
 	 * 그룹 생성
 	 * @param cmd
-	 * @param userId
 	 * @return
 	 */
 	@Override
 	@Transactional
-	public CreateGroupResult create(CreateGroupCommand cmd, Long userId) {
+	public CreateGroupResult create(CreateGroupCommand cmd) {
 
 		//도메인 생성 및 검증
 		var domainGroup = Group.create(cmd);
@@ -36,7 +35,7 @@ public CreateGroupResult create(CreateGroupCommand cmd, Long userId) {
 		Long groupId = groupRepository.saveNewGroup(domainGroup);
 
 		//그룹 멤버 저장
-		groupMemberRepository.saveOwner(groupId, userId);
+		groupMemberRepository.saveOwner(groupId, cmd.userId());
 		
 		return new CreateGroupResult(groupId);
 	}
diff --git a/src/main/java/flipnote/group/domain/model/group/Group.java b/src/main/java/flipnote/group/domain/model/group/Group.java
index e65508d..04dc07a 100644
--- a/src/main/java/flipnote/group/domain/model/group/Group.java
+++ b/src/main/java/flipnote/group/domain/model/group/Group.java
@@ -1,5 +1,8 @@
 package flipnote.group.domain.model.group;
 
+import java.time.LocalDateTime;
+
+import flipnote.group.application.port.in.command.ChangeGroupCommand;
 import flipnote.group.application.port.in.command.CreateGroupCommand;
 import lombok.AccessLevel;
 import lombok.Builder;
@@ -8,7 +11,6 @@
 import lombok.Setter;
 
 @Getter
-@Setter
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
 public class Group {
 
@@ -24,6 +26,9 @@ public class Group {
 	private Long imageRefId;
 	private int memberCount;
 
+	private LocalDateTime createdAt;
+	private LocalDateTime modifiedAt;
+
 	/**
 	 * 신규로 그룹 생성
 	 * @param cmd
@@ -59,7 +64,7 @@ public static Group create(CreateGroupCommand cmd) {
 	 * @param memberCount
 	 * @return
 	 */
-	public static Group getGroup(
+	public static Group restore(
 		Long id,
 		String name,
 		Category category,
@@ -68,7 +73,9 @@ public static Group getGroup(
 		Visibility visibility,
 		int maxMember,
 		Long imageRefId,
-		int memberCount
+		int memberCount,
+		LocalDateTime createdAt,
+		LocalDateTime modifiedAt
 	) {
 		Group g = new Group();
 		g.id = id;
@@ -80,6 +87,8 @@ public static Group getGroup(
 		g.maxMember = maxMember;
 		g.imageRefId = imageRefId;
 		g.memberCount = memberCount;
+		g.createdAt = createdAt;
+		g.modifiedAt = modifiedAt;
 		return g;
 	}