To provide a contact spring with click action in which contact troubles between contacts due to fine dusts is reduced and the variation in load characteristics is small even by heating or repeated action of the switch in a small-sized push button switch.

This is a switch 2 in which, by contacting and separating a movable contact 4 inside the movable contact spring with click action 3 of a dome shape to a fixed contact 5 opposed to it, switching on and off between the movable contact 4 and the fixed contact 5 is made. A plurality of movable contacts 4 composed of a flat contact face 6 and a sharp edge 7 of blade shape are formed by protruding the thickness of 2/3 or less of a material of the movable contact spring by a half-cut process (half shearing) from the outside to the inside direction in the center part of the movable contact spring 3.