A workpiece holder 1 includes a holder head 11 and a holder body 12. The holder head 11 includes a chuck unit 13 for holding a workpiece W, a support pedestal 111 for supporting the chuck unit 13, and a hook 113 provided on a distal end portion of an arm 112 extending from the support pedestal 111. The holder body 12 includes a cylindrical body portion 121, a retained portion 123 that is arranged inside the body portion 121 and rotated around the cylinder axis J1 to be in either a retained state in which the retained portion 123 is retained by the hook 113 on the ?Z direction side or in the released state in which retaining by the hook 113 is released, and a disk spring 126 for biasing the retained portion 123 in the ?Z direction.

A workpiece holder 1 includes a holder head 11 and a holder body 12. The holder head 11 includes a chuck unit 13 for holding a workpiece W, a support pedestal 111 for supporting the chuck unit 13, and a hook 113 provided on a distal end portion of an arm 112 extending from the support pedestal 111. The holder body 12 includes a cylindrical body portion 121, a retained portion 123 that is arranged inside the body portion 121 and rotated around the cylinder axis J1 to be in either a retained state in which the retained portion 123 is retained by the hook 113 on the ?Z direction side or in the released state in which retaining by the hook 113 is released, and a disk spring 126 for biasing the retained portion 123 in the ?Z direction.

A workpiece holder 1 includes a holder head 11 and a holder body 12. The holder head 11 includes a chuck unit 13 for holding a workpiece W, a support pedestal 111 for supporting the chuck unit 13, and a hook 113 provided on a distal end portion of an arm 112 extending from the support pedestal 111. The holder body 12 includes a cylindrical body portion 121, a retained portion 123 that is arranged inside the body portion 121 and rotated around the cylinder axis J1 to be in either a retained state in which the retained portion 123 is retained by the hook 113 on the Z direction side or in the released state in which retaining by the hook 113 is released, and a disk spring 126 for biasing the retained portion 123 in the Z direction.

A workpiece holder 1 includes a holder head 11 and a holder body 12. The holder head 11 includes a chuck unit 13 for holding a workpiece W, a support pedestal 111 for supporting the chuck unit 13, and a hook 113 provided on a distal end portion of an arm 112 extending from the support pedestal 111. The holder body 12 includes a cylindrical body portion 121, a retained portion 123 that is arranged inside the body portion 121 and rotated around the cylinder axis J1 to be in either a retained state in which the retained portion 123 is retained by the hook 113 on the Z direction side or in the released state in which retaining by the hook 113 is released, and a disk spring 126 for biasing the retained portion 123 in the Z direction.