a card connector comprises an insulating housing ; a plurality of contacts retained in the insulating housing ; a shielding being approximate encircled fame to defining a card receiving space with a card inserting opening at one end thereof along a card inserting direction and another opening cooperated with the housing at the other end thereof , the shielding having a pair of opposite side edges , one of the side edges being in substantially linear configuration and the other of the side edges being in a step configuration so that width of the card inserting opening is wider than that of the insulating housing .