In order to obtain the surface shape which is uniform in each of the circumferential direction and the axial direction without being deviated in one direction on the surface, a developer holding body is provided which is arranged so as to face an image holding body, holds a developer as a layer onto a roughened surface, and supplies the developer in order to develop an image which is formed on the image holding body, and wherein the roughening is executed on the basis of a ratio of cutting depths in a plurality of directions.