The card edge connector is provided. An electrical connecting unit has a slot used for connecting component to insert into, the electrical connecting unit has at least one pivot unit, a retaining device hinges to the pivot unit, and corresponding to the connecting component along the pivot rotation area, the retaining device has an exerting area, and the exerting area has at least a handle unit. The card edge connector, the retaining device has at least one tool operating slot and at least one handle unit, when the connecting component is ejected, the space on the mother board is too small to exerting the force on to said handle unit, an auxiliary tool makes the tool operating slot eject the connecting component, if the space on the mother board is big enough to exerting the force on to the handle unit, then the handle unit ejects the connecting component.