An electrical connector includes an insulating housing defining an uninterrupted tongue portion with opposite first surface and second surface and a plurality of contacts loaded in the tongue portion. The first surface defines at least one rib. The plurality of contacts includes a first group of contacts with contacting portions loaded in the first surface at one side of the at least one rib, a second group of contacts with contacting portions loaded in the first surface at another side of the rib and a third group of contacts with contacting portions loaded in the second surface opposite to the at least one rib. Each of the second and third group of contacts is composed of signal contacts and grounding contacts. The grounding contacts of each group unitarily connect with each other by a connecting bar at front distal ends thereof.