An electrical connector includes a supporting body, an insulating body engaged on the supporting body, a plurality of first terminals integrated in the insulating body, a plurality of second terminals integrated in the supporting body, and a shielding shell enclosing the supporting body and the insulating body. The first and the second terminals have contact portions thereof alternately arranged in two rows in longitudinal direction, and have soldering portions thereof vertically located with tail ends thereof projecting beyond a bottom face of the supporting body. The soldering portions are alternately arranged in two rows in longitudinal direction. The electrical connector of the present invention not only has high signal transmission rate and miniaturized structure, but also can be assembled quickly and accurately, thus it saves a lot of manpower and material resources, reduces the production cost and further improves the production efficiency.