An electrical connector (100) comprises an insulative housing (1) defining a number of passageways (10) and shielding holes (14) arranged among the passageways, a conductive covering (5, 6) provided on a top surface of the insulative housing, a dielectric covering (7, 8) provided on a top surface of the conductive covering, a number of electrical contacts (2) receiving in the passageways and comprising a number of signal contacts (22) and grounding contacts (21), and a plurality of conductive elements (3) received in the shielding holes (14) and electrically connected to the grounding contacts (21) through the conductive covering (5, 6), the conductive elements (3) being insulated from the signal contacts (22).