To provide a polishing tool for a painting surface and a method of polishing a painting surface capable of favorably finishing the painting surface in an extremely short time without requiring skill of a worker.

This polishing tool 1 for a painting surface P1 is detachably attached to a vibration plate 3 of a vibrating polisher 2 provided with the vibration plate 3 alternately repeating normal rotation and reverse rotation by a driving device. The polishing tool l comprises a polishing tool body 11 molded in a circle-shape and having elasticity, an attaching sheet 10b fixed on the back surface of the polishing tool body 11 and detachably attached to the front of the vibration plate, and a polishing sheet 12 fixed on the front of the polishing tool body 11 and made of nonwoven fabric.