A card edge connector includes an elongated insulative housing, a plurality of first terminals, a plurality of second terminals retained in the insulative housing. The insulative housing defining a central slot, a first side wall, and a second side wall opposite to the first side wall. The first terminals each defines a first level soldering portion extend out of the first side wall in a width direction of the insulative housing. The second terminals each defines a second level soldering portion merely under the insulative housing to closer to the first soldering portions for occupying less area of a mother board.