diff --git a/src/main/java/com/hobak/happinessql/domain/activity/api/ActivityController.java b/src/main/java/com/hobak/happinessql/domain/activity/api/ActivityController.java
index fba02c0..4c039ca 100644
--- a/src/main/java/com/hobak/happinessql/domain/activity/api/ActivityController.java
+++ b/src/main/java/com/hobak/happinessql/domain/activity/api/ActivityController.java
@@ -2,9 +2,8 @@
 
 import com.hobak.happinessql.domain.activity.application.ActivityCreateService;
 import com.hobak.happinessql.domain.activity.application.ActivityDeleteService;
-import com.hobak.happinessql.domain.activity.dto.ActivityCreateRequestDto;
-import com.hobak.happinessql.domain.activity.dto.ActivityCreateResponseDto;
-import com.hobak.happinessql.domain.activity.dto.ActivityListResponseDto;
+import com.hobak.happinessql.domain.activity.application.ActivityUpdateService;
+import com.hobak.happinessql.domain.activity.dto.*;
 import com.hobak.happinessql.domain.activity.application.ActivityListService;
 import com.hobak.happinessql.global.response.DataResponseDto;
 import lombok.RequiredArgsConstructor;
@@ -18,7 +17,7 @@ public class ActivityController {
     private final ActivityListService activityListService;
     private final ActivityCreateService activityCreateService;
     private final ActivityDeleteService activityDeleteService;
-
+    private final ActivityUpdateService activityUpdateService;
     @GetMapping
     public DataResponseDto<ActivityListResponseDto> getActivitiesByUserId(@RequestParam Long userId) {
         ActivityListResponseDto response = activityListService.getActivitiesByUserId(userId);
@@ -34,4 +33,9 @@ public Long deleteActivity(@PathVariable Long activityId){
         activityDeleteService.deleteActivity(activityId);
         return activityId;
     }
+    @PutMapping("/{activityId}")
+    public DataResponseDto<ActivityUpdateResponseDto> updateActicity(@PathVariable Long activityId, @RequestBody ActivityUpdateRequestDto requestDto){
+        ActivityUpdateResponseDto responseDto = activityUpdateService.updateActivity(activityId,requestDto);
+        return DataResponseDto.of(responseDto,"활동을 성공적으로 수정했습니다.");
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityUpdateService.java b/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityUpdateService.java
new file mode 100644
index 0000000..a7e2592
--- /dev/null
+++ b/src/main/java/com/hobak/happinessql/domain/activity/application/ActivityUpdateService.java
@@ -0,0 +1,26 @@
+package com.hobak.happinessql.domain.activity.application;
+
+import com.hobak.happinessql.domain.activity.converter.ActivityConverter;
+import com.hobak.happinessql.domain.activity.domain.Activity;
+import com.hobak.happinessql.domain.activity.dto.ActivityUpdateRequestDto;
+import com.hobak.happinessql.domain.activity.dto.ActivityUpdateResponseDto;
+import com.hobak.happinessql.domain.activity.exception.ActivityNotFoundException;
+import com.hobak.happinessql.domain.activity.repository.ActivityRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@Transactional
+@RequiredArgsConstructor
+public class ActivityUpdateService {
+    private final ActivityRepository activityRepository;
+
+    public ActivityUpdateResponseDto updateActivity(Long activityId, ActivityUpdateRequestDto requestDto){
+        Activity activity = activityRepository.findById(activityId)
+                .orElseThrow(()-> new ActivityNotFoundException("Activity with id " + activityId));
+        activity.updateName(requestDto.getName());
+        return ActivityConverter.toActivityUpdateResponseDto(activity);
+    }
+
+}
diff --git a/src/main/java/com/hobak/happinessql/domain/activity/converter/ActivityConverter.java b/src/main/java/com/hobak/happinessql/domain/activity/converter/ActivityConverter.java
index 6c42350..d9ca745 100644
--- a/src/main/java/com/hobak/happinessql/domain/activity/converter/ActivityConverter.java
+++ b/src/main/java/com/hobak/happinessql/domain/activity/converter/ActivityConverter.java
@@ -4,6 +4,7 @@
 import com.hobak.happinessql.domain.activity.domain.Category;
 import com.hobak.happinessql.domain.activity.dto.ActivityCreateResponseDto;
 import com.hobak.happinessql.domain.activity.dto.ActivityDto;
+import com.hobak.happinessql.domain.activity.dto.ActivityUpdateResponseDto;
 import com.hobak.happinessql.domain.activity.dto.CategoryDto;
 
 import java.util.List;
@@ -38,4 +39,12 @@ public static ActivityCreateResponseDto toActivityCreateResponseDto(Long activit
                 .activityId(activityId)
                 .build();
     }
+    public static ActivityUpdateResponseDto toActivityUpdateResponseDto(Activity activity){
+        return ActivityUpdateResponseDto.builder()
+                .categoryId(activity.getCategory().getCategoryId())
+                .categoryName(activity.getCategory().getName())
+                .activityId(activity.getActivityId())
+                .activityName(activity.getName())
+                .build();
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/hobak/happinessql/domain/activity/domain/Activity.java b/src/main/java/com/hobak/happinessql/domain/activity/domain/Activity.java
index 3560dc7..c592166 100644
--- a/src/main/java/com/hobak/happinessql/domain/activity/domain/Activity.java
+++ b/src/main/java/com/hobak/happinessql/domain/activity/domain/Activity.java
@@ -40,5 +40,8 @@ public Activity(Long activityId, String name, Category category) {
         this.name = name;
         this.category = category;
     }
+    public void updateName(String name){
+        this.name = name;
+    }
 }
 
diff --git a/src/main/java/com/hobak/happinessql/domain/activity/dto/ActivityUpdateRequestDto.java b/src/main/java/com/hobak/happinessql/domain/activity/dto/ActivityUpdateRequestDto.java
new file mode 100644
index 0000000..4636ed5
--- /dev/null
+++ b/src/main/java/com/hobak/happinessql/domain/activity/dto/ActivityUpdateRequestDto.java
@@ -0,0 +1,16 @@
+package com.hobak.happinessql.domain.activity.dto;
+
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class ActivityUpdateRequestDto {
+    String name;
+    @Builder
+    ActivityUpdateRequestDto(String name){
+        this.name = name;
+    }
+}
diff --git a/src/main/java/com/hobak/happinessql/domain/activity/dto/ActivityUpdateResponseDto.java b/src/main/java/com/hobak/happinessql/domain/activity/dto/ActivityUpdateResponseDto.java
new file mode 100644
index 0000000..a7a8386
--- /dev/null
+++ b/src/main/java/com/hobak/happinessql/domain/activity/dto/ActivityUpdateResponseDto.java
@@ -0,0 +1,22 @@
+package com.hobak.happinessql.domain.activity.dto;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+
+public class ActivityUpdateResponseDto {
+    private Long categoryId;
+    private String categoryName;
+    private Long activityId;
+    private String activityName;
+    @Builder
+    ActivityUpdateResponseDto(Long categoryId, String categoryName, Long activityId, String activityName){
+        this.categoryId = categoryId;
+        this.categoryName = categoryName;
+        this.activityId = activityId;
+        this.activityName = activityName;
+    }
+}