A card connector (100) includes an insulative housing (2), a metal cover (1) attached to the insulative housing to jointly define a receiving space (10), a number of contacts (3) fixed in the insulative housing, and a tray member (4) slidably received in the receiving space. The metal cover includes a first locking arm (13) extending into the receiving space. Each contact includes a contacting section (32) protruding into the receiving space. The tray member includes a frame (41) and a metal piece (42) cooperative with the frame to define a card-receiving cavity (40). The metal piece includes a first tab (421) to make contact with the first locking arm (13) when the tray member is inserted into the receiving space (10) along a tray-insertion direction.