A switch device comprises a magnetic body (3) with an elongated shape having one end portion which is in contact with the magnetic pole surface of a magnet (4) and extending between the magnet (4) and a fixed contactor (1) and/or a mobile contactor (2). One of the contactors (1, 2) is formed from a magnetic material and integrally with the magnetic body (3) to form a contactor (10) with an integrated attraction rod.