A card edge connector (100) for receiving a memory card (200) includes an insulative housing (1) and a number of terminals (2) retained therein. The insulative housing (1) includes an elongated base (10) extending along a longitudinal direction thereof and a pair of tower section (18) extending upwardly from opposite ends of the base (10). The base (10) defines a receiving slot (10) for receiving the memory card (200) and two rows of contact receiving channels (111) communicated with the slot (10). Each tower section (18) includes a pair of opposed arms (13) and a cavity (15) located therebetween. The arm (13) has a cantilever type resilient finger (132) formed from an inner wall of the arm (13) and extending downwardly for sandwiching the memory card (200), and a locking projection (131) at an upper portion thereof to engage with a notch (203) of the memory card (200).