Referring to FIG. 6 and FIG. 7, a conventional electrical connector 100′ includes an insulating housing 10′, two groups of conductive terminals 20′ and a shielding element 30′. The insulating housing 10′ includes a main portion 11′, a first tongue portion 12′ protruded frontward from a front surface of the main portion 11′, and a second tongue portion 13′ protruded frontward from a front surface of the first tongue portion 12′. The two groups of conductive terminals 20′ are fastened in the insulating housing 10′. Front ends of one group of the conductive terminals 20′ are exposed to a top surface of the second tongue portion 13′ through the front surface of the first tongue portion 12′ and arranged transversely. Front ends of the other group of the conductive terminals 20′ are exposed to a bottom surface of the second tongue portion 13′ through the front surface of the first tongue portion 12′ and arranged transversely. The front ends of the two groups of the conductive terminals 20′ exposed to the top surface and the bottom surface of the second tongue portion 13′ are defined as exposing portions. Rear ends of the two groups of the conductive terminals 20′ project beyond a rear surface of the main portion 11′.