PURPOSE: To violently thrust wire pieces to the body to be polished so as to polish the body to be polished extremely pretty, by providing a processing container so that the center axis thereof becomes horizontal and also arranging magnets in opposition with the center axis of the processing container being interposed at the outer periphery vicinity of the processing container.

CONSTITUTION: Wire pieces 13 are thrusted to the body to be polished inside the processing container 10 to polish the body to be polished by the rotation of the magnet 3 provided on a rotating frame 1 accompanied by the driving of a motor 2. In this case, the processing container 10 is provided so that the center axis thereof becomes horizontal and also the magnets 3 are arranged in opposition by interposing the center axis of the processing container 10 at the outer peripheral vicinity of the processing container 10. Since the wire pieces 13 can follow the rotation of the magnet 3 even in case of the magnets 3 rotation number being increased to about 12000rpm, they can be thrusted violently to the body 14 to be polished and the body 14 to be polished can be polished very splendidly.