A switch for detecting a tilting operation is constructed easy to assemble. A tilt detecting section A is provided on an upper surface of an intermediate wall portion 12B of an upper case 12, a depression detecting section B is provided in a central position of an upper surface of a bottom wall portion 13B of a lower case 13, and a rotation detecting section C is provided around the depression detecting section. A top cover 11 is provided to cover an upper end of the upper case 12 to which the upper case 12 is engageably connected. The lower case 13 is engageably connected to the upper case 12.