An electrical connector to be electrically connected to a plug includes a plastic base, a metal housing and an engaging element. A connection slot and terminals are formed on the base. Each terminal has a pin portion extending out of the plastic base. The metal housing covers the plastic base while exposing the connection slot and the pin portions. The engaging element has a fixing part and an elastic engaging piece which is located within the connection slot. A projecting engaging portion, which is near a distal end of the engaging element and engages with the plug, is formed. The metal housing is composed of a thin metal plate which is bent. The engaging element and the metal housing pertain to different parts. A thickness of the engaging element is greater than that of the metal housing. The engaging element is assembled in the plastic base through the fixing part.