A slide switch includes a case forming an accommodation space, a first contact disposed in the accommodation space, a second contact disposed in the accommodation space, a third contact disposed in the accommodation space, and a slider fixed to the third contact. The slider is movable between a first position in which the first contact and the second contact are electrically insulated from each other and a second position in which the first contact and the second contact are electrically connected to each other via the third contact. The case includes a projection supporting the third contact in a normal direction of a plane which includes a moving path of the slider in the accommodation space.