Abstract: A female type electrical connector produced by stamping and bending of thin sheet metal including a receptacle section and a wire connection connected to the rear end of the receptacle section. The receptacle section includes a tongue extending from the front end thereof and formed with a locking projection on its upper surface, and being pivotable on its front end for resiliently moving downwardly, and two side walls each having a curved wall. The curved walls of the side walls extend from outside the opposite side edges of the tongue and are curved upwardly to extend above the tongue, and terminating at free ends which extend longitudinally and are juxtaposed to the upper surface of the tongue. The locking projection engages a projection receiving portion of a male electrical connector to lock the latter in place when the male type electrical connector is inserted between the upper surface of the tongue and the free ends of the two side walls and held therebetween.