An electrical connector includes an insulating housing, a plurality of conductive terminals, a detecting contact and a metallic shell. The insulating housing has a base portion extending along a longitudinal direction and a mating tongue extending forwardly from the base portion. The mating tongue has a receiving slot recessed therefrom in which the detecting contact received. The metallic shell surrounds the insulating housing to form a receiving room. The detecting contact defines a detecting section extending out of the receiving slot for protruding into the receiving room. The insulating housing defines a supporting block formed in the receiving slot for supporting the detecting contact to prevent the detecting contact from over-skewing.