The present invention provides an electromagnet device including: an electromagnet block having a spool around which a coil is wound and an iron core inserted in a central hole of the spool; a yoke connected to an end portion of the iron core via a permanent magnet; a movable iron piece pivotably supported on a pivoting shaft center located at an end face edge portion of the yoke, the movable iron piece is adapted to pivot on a basis of magnetization and demagnetization of the electromagnet block, and a protrusion having a linear edge portion which extends in parallel to the pivoting shaft center and the protrusion protrudes from at least either the movable iron piece or the iron core, the protrusion protrudes in a facing direction in which the movable iron piece and the iron core face each other.