To provide a coupling member, which is not easily bent by itself, capable of easily confirming the coupling state of itself by fixing a coupling part of themselves in a prescribed angle.

In a coupling member 1, in order to connect a heater 25 to a transformer 30 and obtain an electrical connection, an insulating part 2 is interposed between conductive parts 3a, and the protrusions 4 are arranged at the one end 1a of the conductive parts 3 so as to face each other with an insulation part 2 as a center, and extend from the insulation part 2 toward the conductive part 3. A hook-shaped hole part 21 is arranged at the other end 1b of the conductive parts 3 so as to face each other with the insulating part 2 as a center and penetrate through the other end 1b of the conductive part 3.