An electrical connector includes an insulating housing having a front wall, a top wall, a bottom wall and two side walls. A rear surface of the front wall extends rearward to form a tongue portion. A receiving space is formed among the front wall, the top wall, the bottom wall and the side walls, wherein the tongue portion is located in the receiving space. A plurality of probe pins is assembled in the insulating housing. A magnetic block has a shape matched with the receiving space and is assembled in the receiving space. A metal plate is placed behind the magnetic block by passing a rear end of the tongue portion therethrough. A metal shell encloses the insulating housing and further electrically resists against a rear side of the metal plate to secure the magnetic block and the metal plate in the insulating housing.