diff --git a/nestjs-BE/server/src/boards/dto/create-board.dto.ts b/nestjs-BE/server/src/boards/dto/create-board.dto.ts
index a958215b..d128f517 100644
--- a/nestjs-BE/server/src/boards/dto/create-board.dto.ts
+++ b/nestjs-BE/server/src/boards/dto/create-board.dto.ts
@@ -1,10 +1,12 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsNotEmpty, IsString } from 'class-validator';
+import { IsNotEmpty, IsString, MaxLength } from 'class-validator';
+import { MAX_NAME_LENGTH } from 'src/config/magic-number';
 
 export class CreateBoardDto {
   @ApiProperty({ description: '보드 이름' })
   @IsString()
   @IsNotEmpty()
+  @MaxLength(MAX_NAME_LENGTH)
   boardName: string;
 
   @ApiProperty({ description: '스페이스 id' })
diff --git a/nestjs-BE/server/src/config/magic-number.ts b/nestjs-BE/server/src/config/magic-number.ts
index 75e72de4..00635ab5 100644
--- a/nestjs-BE/server/src/config/magic-number.ts
+++ b/nestjs-BE/server/src/config/magic-number.ts
@@ -10,3 +10,4 @@ export const REFRESH_TOKEN_EXPIRY_DAYS = 14;
 export const INVITE_CODE_CACHE_SIZE = 5000;
 export const INVITE_CODE_LENGTH = 10;
 export const INVITE_CODE_EXPIRY_HOURS = 6;
+export const MAX_NAME_LENGTH = 20;