To provide a metal dome switch that is superior in fatigue resistance property, even if applied with Ni or Ag plating.

In the metal dome switch superior in fatigue resistance characteristics, in which Ni or Ag plating is applied on an area in contact with a contact part with its bent part deformed and reversed, when it is pressed, provided that the distance from a center of the area in contact with contact part with its bent part deformed and reversed, and the boundary of the bent part and a pedestal part is L, and that the Ni or Ag plating is not applied within the range from L×0.9 (not inclusive) to L.