Abstract: An electrical connector having a locking member which includes at one end an anchoring part shaped for hooking a mating connector, an engagement part to be secured to one of projections provided on both sides of a shell enclosing a main connector body, and at the other end a knob portion having a leaf spring. The engagement part is positioned between the anchoring part and the knob portion. The engagement part has a protrusion near to the center of the width of one end adjacent the knob portion, and two plate pieces on both the sides of the protrusion. Each of the plate pieces has a free end in the form of a resilient cantilever directing toward the protrusion. The spacing between the free ends of the two plate pieces is less than the width of the projection of the shell.