To improve the wearing performance of an inversion cam face portion so as to use for a long period by bringing the coil portion of a torsion coil spring into contact with the inversion cam face portion integrated with a central terminal in a switch device.

A conductor plate 23 is rocked by a slide 13 so that the moving contact 23a of the conductor plate 23 departs from and touches to a fixed contact. A torsion coil spring 24 is fitted near the rock shaft of the conductor plate 23, and an inversion cam face portion 30c, which faces to the central terminal 30 and pressing touches the peripheral face of the coil portion of the torsion coil spring 24 so as to inverting holds the conductor plate 23 in on and off states, is disposed. A connection terminal 30a, an end edge step portion 30b, and the inversion cam face portion 30c are integrally formed as the central terminal 30 via a connection piece portion 30d. Thereby, the coil portion of the torsion coil spring 24 abuts the inversion cam face portion 30c integrated with the central terminal 30 so that the wearing resistance of the inversion cam face 30c is improved and it bears for a long period use.