The brush bristle material of this invention has a synthetic resin material and a metallic material integrated into one or more pieces. The synthetic resin material and the metallic material mentioned above are made of nearly plate bar members and are integrated in the form of a plate or a bar or in any proper form by being mutually combined like a sandwich. The brush bristle material integrated by mutual combination of the component materials is enabled to combine the characteristic properties of the synthetic resin material and the metallic material and acquire proper hardness, elastic force and frictional force suited to a given workpiece, the shape of the workpiece and the purpose of use of the workpiece. This invention concerns a brush bristle material obtained by combining in a varying manner brush bristle materials made of raw materials differing in nature into one piece and enabled to produce a polish conforming to the hardness, shape and object of polishing of a workpiece and a brush manufactured of such brush bristle material.
