An electrical connector comprises an insulated housing (1) defines a receiving cavity (10) and a pair of latching portions respectively formed at longwise ends thereof; a plurality of conductive terminals (2, 2′) disposed in the housing and each has a contact portion exposed to the receiving cavity; a stuffer member (3) mounted to the housing and moving between an open position and a closed position; and a pair of metal strengthen member (4) mounted to the housing. The stuffer member comprises a main plate (31), a tongue plate (32) extending from a middle portion of the main plate and a pair of latching arms (33) extending from two longwise ends of the main plate to locate beside the tongue plate. Each latching arm has a latch (331) bending inward from its free end. The metal strengthen member has a stopping tab (42) cooperating with the latching portion to engage with the latch of the latching arm when the stuffer member in the open position.