A shielded electrical connector assembly includes a conductive housing having receptacle means for receiving a complementary mating connector. A terminal module includes a dielectric terminal block mounted in the conductive housing at the receptacle. The terminal block mounts a plurality of spaced terminals having contact portions projecting into the receptacle and adapted for electrical interconnection with appropriate contacts of the complementary mating connector. The terminal block has openings between the spaced terminals. The conductive housing includes integral shield portions projecting into the openings in the terminal block between the spaced terminals. The housing also includes integral ground portions in the receptacle and adapted for interconnection with appropriate ground contacts of the mating connector.