A card edge connector for receiving a memory card includes an insulative housing with a central slot for receiving the memory card and a plurality of terminal contacts retained in a plurality of grooves defined by the insulative housing and a retainer positioned on the housing. The retainer defines a body portion mounted on the housing, a locking portion extending into the housing from the body portion and a elastic engaging portion extending downwardly into the central slot from inner side of the body portion for steadily locking the memory card.