Core moving device of wire electric discharge machine

A core moving device of a wire electric discharge machine comprising:

• a core adsorption holding part which adsorbs a core cut out of a workpiece with a magnetic force of a magnet and moves the core relative to the workpiece, wherein
• the core adsorption holding part includes:
• a rod member in which at least a distal end portion thereof is constituted of the magnet;
• a cylindrical member into which the rod member is inserted and which, on one hand, moves backward relative to the rod member to a base end portion side of the rod member to expose a distal end surface of the rod member so that the core is adsorbed to the distal end surface of the rod member by the magnet and, on the other hand, moves forward relative to the rod member to the distal end portion side of the rod member to protrude beyond the distal end surface of the rod member so that the core having been adsorbed to the distal end surface of the rod member by the magnet is pushed out against the magnetic force and removed;
• and
• a cylindrical member drive unit which moves the cylindrical member forward relative to the rod member to at least the distal end portion side of the rod member.