An electrical connector includes an insulating housing, a plurality of first terminals each having a first elastic portion, a plurality of second terminals each having a second elastic portion, and a shielding shell enclosing the insulating housing. The insulating housing has a top wall, a bottom wall, a rear wall and two side walls which together surround an inserting chamber thereamong. The top wall and the bottom wall respectively define a plurality of first terminal grooves and second terminal grooves which are opened symmetrically about the inserting chamber and communicate with the inserting chamber. The first and second terminals are respectively inserted frontward in the first and second terminal grooves with the first elastic portions and the second elastic portions face-to-face projecting into the inserting chamber and being symmetrical in structure and arrangement about the inserting chamber.