An electrical connector to be electrically connected to a transmission cable plug. The connector includes a plastic base, a metal housing and at least one fastening assembly. At least one connection slot and a plurality of terminals are formed on the plastic base. Each of the terminals has a pin portion extending out of the plastic base. The metal housing covers the plastic base while exposing the at least one connection slot of the plastic base and the pin portions of the terminals to the outside. The at least one fastening assembly contacts the metal housing and thus is electrically connected to a circuit board. The at least one fastening assembly and the metal housing pertain to different parts.