An electrical connector includes a terminal module and a shielding shell surrounding the terminal module. The terminal module has an insulative housing and a plurality of conductive terminals retained in the insulative housing. The shielding shell has a metallic shell and a waterproof shell insert molded on an outer side of the metallic shell. The metallic shell surrounds the insulative housing to form a mating cavity opening forwardly. The shielding shell has a sealing member disposed between the metallic shell and the waterproof shell and a retaining member disposed at a rear side of the waterproof shell. The retaining member is separate from the sealing member. The metallic shell defines an opening slot going therethrough. The sealing member covers the opening slot. The retaining member defines a mounting leg.