diff --git a/server/apps/api/src/user/dto/add-following.dto.ts b/server/apps/api/src/user/dto/follower.dto.ts
similarity index 78%
rename from server/apps/api/src/user/dto/add-following.dto.ts
rename to server/apps/api/src/user/dto/follower.dto.ts
index 69e0cc8b..99ffd33a 100644
--- a/server/apps/api/src/user/dto/add-following.dto.ts
+++ b/server/apps/api/src/user/dto/follower.dto.ts
@@ -1,6 +1,6 @@
 import { IsString } from 'class-validator';
 
-export class AddFollowingDto {
+export class followerDto {
   @IsString()
   myId: string;
 
diff --git a/server/apps/api/src/user/user.controller.ts b/server/apps/api/src/user/user.controller.ts
index 4792608d..9abcccc5 100644
--- a/server/apps/api/src/user/user.controller.ts
+++ b/server/apps/api/src/user/user.controller.ts
@@ -1,9 +1,7 @@
-import { Body, Controller, Get, Inject, LoggerService, Param, Post } from '@nestjs/common';
+import {Body, Controller, Delete, Get, Inject, LoggerService, Param, Post} from '@nestjs/common';
 import { UserService } from './user.service';
-import { AddFollowingDto } from '@user/dto/add-following.dto';
+import { followerDto } from '@user/dto/follower.dto';
 import { WINSTON_MODULE_NEST_PROVIDER } from 'nest-winston';
-import { User } from '@schemas/user.schema';
-import { CreateUserDto } from '@user/dto/create-user.dto';
 import { responseForm } from '@utils/responseForm';
 
 @Controller('api/user')
@@ -25,7 +23,7 @@ export class UserController {
     try {
       const myId = '63734e98384f478a32c3a1cc';
       // TODO: Request Header에서 access token으로 현재 사용자 알아내기
-      const addFollowingDto: AddFollowingDto = { myId, followId: id };
+      const addFollowingDto: followerDto = { myId, followId: id };
       await this.userService.addFollowing(addFollowingDto);
       return responseForm(200, {});
     } catch (error) {
@@ -34,6 +32,19 @@ export class UserController {
     }
   }
 
+  @Delete('following/:id')
+  async unFollowing(@Param('id') id: string) {
+    try {
+      const myId = '63734e98384f478a32c3a1cc';
+      // TODO: Request Header에서 access token으로 현재 사용자 알아내기
+      const unFollowingDto: followerDto = { myId, followId: id };
+      await this.userService.unFollowing(unFollowingDto);
+      return responseForm(200, {});
+    } catch (error) {
+      this.logger.error(JSON.stringify(error.response));
+      return error.response;
+    }
+  }
 
   // @Post()
   // createUser(@Body() createUserDto: CreateUserDto) {
diff --git a/server/apps/api/src/user/user.service.ts b/server/apps/api/src/user/user.service.ts
index 78ec1559..428a3061 100644
--- a/server/apps/api/src/user/user.service.ts
+++ b/server/apps/api/src/user/user.service.ts
@@ -1,6 +1,5 @@
 import { BadRequestException, ConflictException, Injectable } from '@nestjs/common';
-import { AddFollowingDto } from '@user/dto/add-following.dto';
-import { CreateUserDto } from '@user/dto/create-user.dto';
+import { followerDto } from '@user/dto/follower.dto';
 import { UserRepository } from '@repository/user.repository';
 
 @Injectable()
@@ -11,7 +10,7 @@ export class UserService {
   //   this.userRepository.create(createUserDto);
   // }
 
-  async addFollowing(addFollowingDto: AddFollowingDto) {
+  async addFollowing(addFollowingDto: followerDto) {
     const user = await this.userRepository.findById(addFollowingDto.myId);
     const otherUser = await this.userRepository.findById(addFollowingDto.followId);
     if (!user || !otherUser) {
@@ -21,7 +20,38 @@ export class UserService {
     } else if (otherUser.followers.includes(addFollowingDto.myId)) {
       throw new ConflictException('상대방의 팔로워 목록에 이미 있습니다.');
     }
-    this.userRepository.appendFollowing(addFollowingDto);
-    this.userRepository.appendFollwer(addFollowingDto);
+
+    this.userRepository.appendElementAtArr(
+      { _id: addFollowingDto.myId },
+      { followings: addFollowingDto.followId },
+    );
+    this.userRepository.appendElementAtArr(
+      { _id: addFollowingDto.followId },
+      { followers: addFollowingDto.myId },
+    );
+  }
+
+  async unFollowing(unFollowingDto: followerDto) {
+    const user = await this.userRepository.findById(unFollowingDto.myId);
+    const otherUser = await this.userRepository.findById(unFollowingDto.followId);
+    if (!user || !otherUser) {
+      throw new BadRequestException('해당하는 사용자의 _id가 올바르지 않습니다.');
+    } else if (!user.followings.includes(unFollowingDto.followId)) {
+      throw new BadRequestException(
+        `팔로우 요청한 사용자 ${user.nickname}은 ${otherUser.nickname}을 팔로우하고 있지 않습니다.`,
+      );
+    } else if (!otherUser.followers.includes(unFollowingDto.myId)) {
+      throw new ConflictException(
+        `${otherUser.nickname}의 팔로워 목록에 ${user.nickname}가 없습니다.`,
+      );
+    }
+    this.userRepository.deleteElementAtArr(
+      { _id: unFollowingDto.myId },
+      { followings: [unFollowingDto.followId] },
+    );
+    this.userRepository.deleteElementAtArr(
+      { _id: unFollowingDto.followId },
+      { followers: [unFollowingDto.myId] },
+    );
   }
 }
diff --git a/server/dao/repository/user.repository.ts b/server/dao/repository/user.repository.ts
index 8292e2c3..8172ab67 100644
--- a/server/dao/repository/user.repository.ts
+++ b/server/dao/repository/user.repository.ts
@@ -1,8 +1,8 @@
 import { Injectable } from '@nestjs/common';
 import { InjectModel } from '@nestjs/mongoose';
 import { User, UserDocument } from '@schemas/user.schema';
-import { Model } from 'mongoose';
-import { AddFollowingDto } from '@user/dto/add-following.dto';
+import mongoose, { Model, Schema, Types } from 'mongoose';
+import { followerDto } from '@user/dto/follower.dto';
 import { SignUpDto } from '@api/src/auth/dto';
 
 @Injectable()
@@ -22,25 +22,11 @@ export class UserRepository {
     return await this.userModel.findById(_id);
   }
 
-  appendFollowing(addFollowingDto: AddFollowingDto) {
-    this.userModel.updateOne(
-      { _id: addFollowingDto.myId },
-      { $push: { followings: addFollowingDto.followId } },
-      (err, res) => {
-        if (err) throw err;
-      },
-    );
+  async appendElementAtArr(filter, appendElement) {
+    await this.userModel.updateOne(filter, { $push: appendElement });
   }
 
-  appendFollwer(addFollowingDto: AddFollowingDto) {
-    this.userModel.updateOne(
-      { _id: addFollowingDto.followId },
-      {
-        $push: { followers: addFollowingDto.myId },
-      },
-      (err, res) => {
-        if (err) throw err;
-      },
-    );
+  async deleteElementAtArr(filter, removeElement) {
+    await this.userModel.updateOne(filter, { $pullAll: removeElement });
   }
 }