To provide a multicurcuit on/off switch having a thin structure by which a plurality of different circuits can be switched on and off approximately simultaneously by pressing the switch.

A push switch 20 is mounted on a substrate 10, a pressure sensitive switch 30 comprising a pressure sensitive resistance film 33 of which the resistance value in the thickness direction is reduced by pressed in the thickness direction, is mounted on a surface side opposite to the part comprising the push switch 20 of the substrate 10, and the push switch 20 and the pressure sensitive switch 30 are simultaneously switched on by pressing the push switch 20. The push switch 20 comprises a pair of contact patterns 11, 13 mounted on the substrate 10, and an elastic plate 24 mounted on the substrate 10 and reversed when pressed to conduct the pair of contact patterns 11, 13.