PURPOSE: To improve the quality of a work and to perform unmammed automatic working by reciprocating a receiving base receiving concentrated irradiation of laser beam.

CONSTITUTION: When a motor 32 is driven while the work 1 is cut by laser beam, the main frame 23 of an unloading equipment 20 reciprocates in the direction of an arrow A by an eccentric equivalent of a cam 31. Thereby, since a cylindrical body 2, too, mounted on the main frame 23 reciprocates, the opening part 2a of the cylindrical body displaces to the laser beam axis 2a as it receives the laser beam. Consequently, the inner surface of the cylindrical body 2 on the opposite side of the opening part 2a is not irradiated concentrically with the laser beam cut the work 1 and the cylindrical body 2 is not pierced. Consequently, the cylindrical body 2 need not be monitored and unmanned automatic machining can be performed for a long time.