diff --git a/be/src/auth/auth.controller.ts b/be/src/auth/auth.controller.ts
index 7310f85..268af05 100644
--- a/be/src/auth/auth.controller.ts
+++ b/be/src/auth/auth.controller.ts
@@ -1,4 +1,5 @@
 import {
+  Body,
   Controller,
   Headers,
   Post,
@@ -11,7 +12,9 @@ import {
   ApiOperation,
   ApiResponse,
   ApiBearerAuth,
+  ApiBody,
 } from "@nestjs/swagger";
+import { RefreshTokenDto } from "./dto/refreshToken.dto";
 
 @Controller("auth")
 export class AuthController {
@@ -29,4 +32,13 @@ export class AuthController {
   signin(@Headers("authorization") authorization: string) {
     return this.authService.NaverAuth(authorization);
   }
+
+  @Post("refresh-token")
+  @ApiOperation({ summary: "accessToken 재발급" })
+  @ApiResponse({ status: 200, description: "성공적으로 재발급됨." })
+  @ApiResponse({ status: 401, description: "잘못된 refresh token." })
+  @ApiBody({ type: RefreshTokenDto })
+  checkRefreshToken(@Body() refreshTokenDto: RefreshTokenDto) {
+    return this.authService.checkRefreshToken(refreshTokenDto.refreshToken);
+  }
 }
diff --git a/be/src/auth/auth.service.ts b/be/src/auth/auth.service.ts
index dce87db..50e314f 100644
--- a/be/src/auth/auth.service.ts
+++ b/be/src/auth/auth.service.ts
@@ -44,7 +44,7 @@ export class AuthService {
     if (user) {
       const payload = { nickName: user.nickName };
       const accessToken = this.jwtService.sign(payload);
-      
+
       const refreshToken = this.jwtService.sign(payload, {
         secret: "nibobnebob", 
         expiresIn: '7d', 
@@ -58,4 +58,15 @@ export class AuthService {
       );
     }
   }
+
+  async checkRefreshToken(refreshToken: string){
+    try {
+      const decoded = this.jwtService.verify(refreshToken, { secret: 'nibobnebob' });
+      const payload = { id: decoded.id };
+      const accessToken = this.jwtService.sign(payload);
+      return { accessToken };
+    } catch (err) {
+      throw new HttpException('Invalid refresh token', HttpStatus.UNAUTHORIZED);
+    }
+  }
 }
diff --git a/be/src/auth/dto/refreshToken.dto.ts b/be/src/auth/dto/refreshToken.dto.ts
new file mode 100644
index 0000000..557ee5c
--- /dev/null
+++ b/be/src/auth/dto/refreshToken.dto.ts
@@ -0,0 +1,9 @@
+import { ApiProperty } from "@nestjs/swagger";
+
+export class RefreshTokenDto {
+    @ApiProperty({
+        example: "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c",
+        description: "클라이언트가 가지고 있는 refreshToken",
+      })
+    refreshToken: string;
+  }
\ No newline at end of file