A card connector assembly includes a card connector (100) and a memory card (5) received in the card connector. The card connector includes an insulative housing (2), a number of contacts (3) retained in the insulative housing, a slider (41) assembled on the insulative housing and movable relative to the insulative housing, a spring (42) urging the slider along a card ejection direction; and a metal shell (7) covering the insulative housing for defining a card receiving space. The metal shell includes a spring leaf (711, 712) extending into the card receiving space. The memory card forms a metal plate (52) on a top surface thereof and a number of metal traces (51) on a bottom surface thereof. The metal plate is located above the metal traces along a vertical direction and the spring leaf contacts with the metal plate.