PURPOSE: To polish bodies to be polished accurately without handling manually.

CONSTITUTION: A container storing cylinder 4 is provided in a closed box 1, and a container in which abrasives and bodies to be polished are filled is placed on the container storing cylinder 4. A rotating plate 5 is provided under the container storing cylinder 4, multiple magnets 7 are mounted on the rotating plate 5, a variable magnetic field is generated in the container by the rotation of the rotating plate 5, and the abrasives are made to flow to polish the bodies to be polished.