Slide switch

A slider is slidably held in a body and is pushed by insertion of an object to slidingly move. Terminals are provided with fixed contact points disposed on a surface, facing the slider, of the body along a sliding movement direction. The armature is attached to the slider and is provided with moving contact points that slide on a fixed contact point disposition surface of the body in association with sliding movement of the slider. The slider has an armature mounting surface with a side wall protrudingly formed in one end in the sliding movement direction. The body has a facing surface facing an end surface of the side wall in an entire range of sliding movement. At least any one of an end in the sliding movement direction of the end surface of the side wall and an end in the sliding movement direction of the facing surfaces of the body has a foreign substance elimination groove formed therein.