A card edge connector includes a housing defining a card slot, a terminal module and a grounding member. The terminal module includes two rows of terminals and an insulating base with a first surface, a second surface and end surfaces between and connecting with the first and second surfaces. Each row of terminals includes a plurality of signal terminals and a plurality of grounding terminals. The terminals includes contacting sections extending out the first surface of the insulating base and into the card slot, leg sections extending out the second surface of the insulating base, and connecting sections. The grounding member fitly surrounds the end surfaces of the insulating base and includes a group of first contacting arms and a group of second contacting arms, each grounding terminal is contacted with one first contacting arm and one second contacting arm.