diff --git a/src/config/card-repository-factory.ts b/src/config/card-repository-factory.ts
new file mode 100644
index 0000000..6b46566
--- /dev/null
+++ b/src/config/card-repository-factory.ts
@@ -0,0 +1,13 @@
+import type { CardRepository } from '@/domain/card-repository'
+import { MongoCardRepository } from '@/repositories/mongo-card-repository'
+import { MysqlCardRepository } from '@/repositories/mysql-card-repository'
+
+export type RepositoryImpl = 'mysql' | 'mongo'
+
+export function getCardRepository(): CardRepository {
+  const impl = (process.env.DB_IMPL ?? 'mysql') as RepositoryImpl
+  if (impl === 'mongo') {
+    return new MongoCardRepository()
+  }
+  return new MysqlCardRepository()
+}
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