The present invention relates to an electrical connector. The electrical connector includes an insulating body having a plurality of card slots recessed at a front end. The insulating body has adjacent a plurality of first and second receiving slots disposed at a rear end of the card slots. Each of a plurality of first terminals has a first connecting portion received in the first receiving slot. Each of a plurality of second terminals has a second connecting portion received in the first receiving slot. The second terminal has an extending portion extending laterally, entering the first receiving slot, and disposing in a front-rear manner relative to a corresponding part of the first terminal. The insulating body has a gap defined between the extending portion and an adjacent extending portion.