To provide a polishing tool for effectively utilizing a polishing member, by facilitating replacing work of the polishing member, and using the highly versatile sheet-like polishing member without using an exclusive polishing member.

This polishing tool 1 has a circular part 12 constant in a distance from the axis 11, a core member 10 having on a peripheral surface a recess part 13 having a distance from the axis 11 shorter than the circular part 12, and installed in a rotational driving device, and the sheet-like polishing member 20 detachably wound on the circular part 12 and the recess part 13 of the core member 10, and superposed in the recess part 13.