Abstract: A pin plug comprises a plug cover made of a substantially cylindrical body of a metal and having a front end divided into several branches and a pin made of a substantially tubular body of a metal and arranged inside of said plug cover coaxially therewith, two conductors of an electric wire being connected to said plug cover and pin, respectively by soldering or clamping. The pin plug further comprises a molded body of electrically insulating synthetic resin which covers the rear ends of said plug cover and pin and that end of the electric wire which is connected to said plug cover and pin, so that the plug cover and pin are fixed in position without using an electrically insulating plate.