Abstract: A switch device is proposed which includes a plurality of stationary contacts fixedly formed on an insulating substrate, a plurality of movable contacts capable of sliding on the insulating substrate for independently contacting with and separating from the stationary contacts, a common holder case fixed to the insulating substrate, and positioning member provided between the insulating substrate and the holder case for positioning the insulating substrate and the holder case relative to each other. The movable contacts are supported slidably so as to be brought into and out of contact with the stationary contact in a switching manner. Thus, the positioning of the movable contacts relative to the stationary contact is extremely easy, thereby providing an improved assembling efficiency.