diff --git a/dictation_server/.devcontainer/docker-compose.yml b/dictation_server/.devcontainer/docker-compose.yml
index 47cf396..c3de580 100644
--- a/dictation_server/.devcontainer/docker-compose.yml
+++ b/dictation_server/.devcontainer/docker-compose.yml
@@ -2,7 +2,6 @@ version: '3'
 
 services:
   dictation_server:
-    env_file: ../.env
     build: .
     working_dir: /app/dictation_server
     ports:
diff --git a/dictation_server/src/app.module.ts b/dictation_server/src/app.module.ts
index 3deb54c..49b1d97 100644
--- a/dictation_server/src/app.module.ts
+++ b/dictation_server/src/app.module.ts
@@ -44,6 +44,7 @@ import { SortCriteriaRepositoryModule } from './repositories/sort_criteria/sort_
 import { TemplateFilesRepositoryModule } from './repositories/template_files/template_files.repository.module';
 import { WorktypesRepositoryModule } from './repositories/worktypes/worktypes.repository.module';
 import { TemplatesService } from './features/templates/templates.service';
+import { validate } from './common/validators/env.validator';
 
 @Module({
   imports: [
@@ -60,6 +61,7 @@ import { TemplatesService } from './features/templates/templates.service';
     ConfigModule.forRoot({
       envFilePath: ['.env.local', '.env'],
       isGlobal: true,
+      validate,
     }),
     AuthModule,
     AdB2cModule,
diff --git a/dictation_server/src/common/validators/env.validator.ts b/dictation_server/src/common/validators/env.validator.ts
new file mode 100644
index 0000000..9ceea2a
--- /dev/null
+++ b/dictation_server/src/common/validators/env.validator.ts
@@ -0,0 +1,198 @@
+import { plainToClass } from 'class-transformer';
+import {
+  IsNotEmpty,
+  IsNumber,
+  IsOptional,
+  IsString,
+  validateSync,
+} from 'class-validator';
+
+/**
+ * 環境変数の型定義
+ */
+export class EnvValidator {
+  // .env
+  @IsNotEmpty()
+  @IsString()
+  DB_HOST: string;
+
+  @IsNotEmpty()
+  @IsNumber()
+  DB_PORT: number;
+
+  @IsNotEmpty()
+  @IsNumber()
+  DB_EXTERNAL_PORT: number;
+
+  @IsNotEmpty()
+  @IsString()
+  DB_NAME: string;
+
+  @IsNotEmpty()
+  @IsString()
+  DB_ROOT_PASS: string;
+
+  @IsNotEmpty()
+  @IsString()
+  DB_USERNAME: string;
+
+  @IsNotEmpty()
+  @IsString()
+  DB_PASSWORD: string;
+
+  @IsOptional()
+  @IsString()
+  NO_COLOR: string;
+
+  @IsNotEmpty()
+  @IsNumber()
+  ACCESS_TOKEN_LIFETIME_WEB: number;
+
+  @IsNotEmpty()
+  @IsNumber()
+  REFRESH_TOKEN_LIFETIME_WEB: number;
+
+  @IsNotEmpty()
+  @IsNumber()
+  REFRESH_TOKEN_LIFETIME_DEFAULT: number;
+
+  @IsNotEmpty()
+  @IsString()
+  TENANT_NAME: string;
+
+  @IsNotEmpty()
+  @IsString()
+  SIGNIN_FLOW_NAME: string;
+
+  @IsNotEmpty()
+  @IsNumber()
+  EMAIL_CONFIRM_LIFETIME: number;
+
+  @IsNotEmpty()
+  @IsString()
+  APP_DOMAIN: string;
+
+  @IsNotEmpty()
+  @IsNumber()
+  STORAGE_TOKEN_EXPIRE_TIME: number;
+
+  // .env.local
+  @IsOptional()
+  @IsString()
+  STAGE: string;
+
+  @IsOptional()
+  @IsString()
+  CORS: string;
+
+  @IsNotEmpty()
+  @IsNumber()
+  PORT: number;
+
+  @IsNotEmpty()
+  @IsString()
+  AZURE_TENANT_ID: string;
+
+  @IsNotEmpty()
+  @IsString()
+  AZURE_CLIENT_ID: string;
+
+  @IsNotEmpty()
+  @IsString()
+  AZURE_CLIENT_SECRET: string;
+
+  @IsNotEmpty()
+  @IsString()
+  ADB2C_TENANT_ID: string;
+
+  @IsNotEmpty()
+  @IsString()
+  ADB2C_CLIENT_ID: string;
+
+  @IsNotEmpty()
+  @IsString()
+  ADB2C_CLIENT_SECRET: string;
+
+  @IsNotEmpty()
+  @IsString()
+  ADB2C_ORIGIN: string;
+
+  @IsNotEmpty()
+  @IsString()
+  KEY_VAULT_NAME: string;
+
+  @IsNotEmpty()
+  @IsString()
+  JWT_PRIVATE_KEY: string;
+
+  @IsNotEmpty()
+  @IsString()
+  JWT_PUBLIC_KEY: string;
+
+  @IsNotEmpty()
+  @IsString()
+  SENDGRID_API_KEY: string;
+
+  @IsNotEmpty()
+  @IsString()
+  MAIL_FROM: string;
+
+  @IsNotEmpty()
+  @IsString()
+  NOTIFICATION_HUB_NAME: string;
+
+  @IsNotEmpty()
+  @IsString()
+  NOTIFICATION_HUB_CONNECT_STRING: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_NAME_US: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_NAME_AU: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_NAME_EU: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_KEY_US: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_KEY_AU: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_KEY_EU: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_ENDPOINT_US: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_ENDPOINT_AU: string;
+
+  @IsNotEmpty()
+  @IsString()
+  STORAGE_ACCOUNT_ENDPOINT_EU: string;
+}
+
+export function validate(config: Record<string, unknown>) {
+  const validatedConfig = plainToClass(EnvValidator, config, {
+    enableImplicitConversion: true,
+  });
+
+  const errors = validateSync(validatedConfig, {
+    skipMissingProperties: false,
+  });
+
+  if (errors.length > 0) {
+    throw new Error(errors.toString());
+  }
+  return validatedConfig;
+}