A card bus connector assembly mounted within a housing (40) includes a card bus connector (10) and an electronic card (20) having a number of grounding pads (23) disposed on a bottom surface thereof and a wedge-shaped protruding portion (29) disposed in an end portion of the electronic card. The card bus connector has a base (11) and a grounding plate (4) mounted to a bottom surface of the base. The grounding plate has a number of grounding terminals (431) extending upwardly for engaging with the grounding pads of the electronic card.