Polishing brush

Abstract

A polishing brush () includes a grinding element bundle () formed with a plurality of wire-shaped grinding elements () formed by impregnating and solidifying an assembly of inorganic filaments with resin, and a grinding element holder () having a holding hole () holding the base end portion of the grinding element bundleon an outer peripheral side surface () serving as a grinding element-holding surface. The grinding element bundle () has a front surface () facing forward in a rotational direction (R) and a back surface () facing backward. The grinding element bundle () is held in the grinding element holder () such that the front surface () and the back surface () are inclined in the same direction relative to a virtual surface () that includes a center point (P) of a cross section () of the grinding element bundle () cut across an outer peripheral side surface () and the axis of center of rotation (L) of the grinding element holder () and extends in a radial direction. The wire-shaped grinding elements () included in the grinding element bundle () are easily displaced and can release excessive force applied thereto.