An electrical connector includes an insulating body, multiple terminals and a metal member. The insulating body has a base and side walls. The base is provided with receiving slots. The side walls are higher than the base, and encircled to form an accommodating space for accommodating a chip module. The terminals are received in the receiving slots. Each terminal has a contacting portion lower than a top surface of the side walls. The contacting portions electrically connect with the chip module. The metal member is injection molded at the side walls and the base to reinforce the structure of the side walls and the base, and preventing the insulating body from warping at a high temperature.