Workpiece holder for holding a plurality of plate-like workpieces used for wire electric discharge machine

A plate-like workpiece holder for holding a plurality of plate-like workpieces used for a wire electric discharge machine, in which the wire electric discharge machine relatively moves a wire electrode stretched between upper and lower wire guides with respect to the plurality of plate-like workpieces stacked on a workpiece stage so as to machine the plurality of plate-like workpieces stacked, the workpiece holder for holding the plurality of plate-like workpieces stacked comprising:

• a cylindrical member in which the plurality of plate-like workpieces are held in a stacked state and which has an inner circumference surface where concave sections corresponding to a machining start point and a machining end point are provided;
• lid members that are mounted on an upper end and a lower end of the cylindrical member to press the plurality of plate-like workpieces;
• and
• a workpiece stage mount member which is secured to the workpiece stage and which has an insertion hole in which the cylindrical member is inserted and housed.