An electrical connector includes a contact module comprising two rows of contacts retained therein and a shielding plate, the contacts module defining a main base, a middle step and a mating tongue and, the middle step being located between the main base and the mating tongue in a mating direction, the contacts comprising contacting portions exposed on opposite surfaces of the mating tongue; a metallic shell retained on the main base and surrounding the mating tongue and the middle step to define a mating cavity thereamong and a one piece grounding collar. The grounding collar includes a collar portion fitly surrounding the middle step and a grounding plate extending from the collar portion to mechanically and electrically connect with the metallic shell.