PURPOSE: To obtain a grindstone having a long service life for cutting and a small roughness on the cutting surface by applying electroplating onto a base material formed of stainless-steel plate, etc. by diamond grinding grains and the soft metal such as tin, etc.

CONSTITUTION: A stainless-steel plate having a thickness of 0.05W0.2mm is cut into a disc free from warp and burr to form a base material 1, and said base material is 1 applied with ground plating by a nickel chloride bath. Then, said material is applied with cosedimentation plating by the liquid containing stannous sulfate 40g/l and diamond powder 1W3g/l. With such treatment, tin 2 and diamond 3 are coprecipitated onto the base material 1, and a grindstone which is thin and has rigidity and with which the amount of abrasion can be reduced and the thickness of a cut article can be made constant can be obtained. Further, the service life can be prolonged, and working cost can be reduced, and the initial tooling for the grindstone can be eliminated.