A universal serial bus connector includes an insulating housing, a plurality of first terminals, a plurality of second terminals, an insulating cover, a terminal module and a shielding shell surrounding the insulating housing, the insulating cover and the terminal module. The insulating housing includes a first base body which defines a first holding groove and a second base body which defines a second holding groove. The first terminals and the second terminals are disposed to the first base body. The insulating cover has a main body received in the first holding groove. The terminal module includes an insulating base and a plurality of third terminals integrally molded to the insulating base. The insulating base has a tongue portion received in the second holding groove, and a second supporting portion. A rear surface of the second supporting portion is flush with a rear surface of the first base body.