An electrical connector includes a base, a cover, a protecting mechanism, and a cam. The base has a contacting area with a plurality of passageways and a first end besides the contacting area with an opening in a first end thereof. The cover is slidably mounted upon the base. The cover defines a plurality of through holes in alignment with the corresponding passageways, respectively, and another opening is defined in a second end thereof and in vertical alignment with the corresponding opening of the base. The protecting mechanism includes a metallic base plate mounted upon the base and defining a stepping hole which includes a larger first hole and a smaller second hole via a drawing process, disposed in the opening of the base. The cam extends axially and vertically in the opening of the cover and the stepping hole of the base, and is riveted on a bottom surface of the base plate.