An electrical connector plug has resilient contact terminals for electrical connection to an electrical connector socket. The electrical connector plug has an electrically conductive housing, and a dielectric shell and resilient contact terminals are mounted in the electrically conductive housing. The dielectric shell has a base portion and a front edge portion extending from the base portion. Two groups of resilient contact terminals are mounted on the dielectric shell and axially symmetrical to each other in the longitudinal direction, with each of the resilient contact terminals having a flat section and an upwardly protruding contact section. A metallic shield frame surrounds the front edge portion and is electrically connected to the electrically conductive housing, with the metallic shield frame having a front section and two lateral protective sections. The lateral protective sections have a height no less than that of the upwardly protruding contact sections.