To provide a bristle material for a polishing brush, and the polishing brush excellent in resistance to drop-off of abrasive particles as well as excellent in welding resistance relative to a workpiece, a polishing property, chemical resistance, and heat resistance.

In the bristle material for the polishing brush, and the polishing brush, the bristle material is composed of a monofilament produced by fusing and fiber-spinning a resin composition with 10 to 40 wt.% of the abrasive particles being kneaded in a major component of a fluororesin, and the abrasive particles are coated with the fluororesin on their surface beforehand.