Abstract: A locking electrical connector having male and female connector bodies forming a plug-in type assembly wherein the female connector body has at least one electrical terminal and the male connector body has at least one terminal-receiving socket in axial alignment therewith to form an electrical connection. The locking electrical connector has at least one pin and socket assembly for maintaining the connector bodies in locking connection with each other wherein a socket is on the female connector body. The male connector body has first and second chambers which exit into a recessed mating area and a plunger assembly capable of being displaced within the second chamber for movement therethrough. The pin is at the front end of the plunger assembly and capable of being positioned within the recessed mating area, and the socket is adapted to pass through the first chamber and contact the pin in positive locking engagement when the male and female connector bodies are engaged.