A card edge connector (100) includes an elongated housing (1) and a plurality of contacts (2). The housing (1) has two side walls (103) and a central slot (109) between the two side walls (103) for receiving a memory module (9). The card edge connector (100) includes a latching mechanism (5) mounted on the two side walls (103) for resisting the memory module (9) downwardly. The latching mechanism (5) can prevent the memory module (9) from moving upwardly, thereby the memory module (9) could be stably connected with the card edge connector (100).