To promote down-sizing and thinning, improvement of contact action reliability between terminals, degree of freedom of designing, life-prolongation, simplification of assembling, and reduction of manufacturing cost.

The switch 1 is provided with a housing 2 in which at least two contacts 11a, 12a of stationary terminals 11, 12 are installed inside, a movable terminal 3 which is formed by bending a metallic wire and reciprocally moves accessibly and detachably to the contacts 11a, 12a of the stationary terminals 11, 12 inside the housing 2, an operation lever 5 which is retractably installed inside the housing 2 in order to make the movable terminal 3 reciprocally move, and a torsion spring that energizes the operation lever 5 to the outside of the housing 2.