An image forming apparatus provided with an image forming portion for forming an image by a developer, a bearing and conveying member capable of bearing thereon and conveying a transfer material on which the developer image is formed, or the developer image directly transferred thereto, and a cleaning portion for cleaning the bearing and conveying member, the cleaning portion has a cleaning blade abutting against the bearing and conveying member, and a holding member holding the cleaning blade and swingable about a rotary shaft, wherein the angle formed by a tangential line on the abutting portion of the cleaning blade against the bearing and conveying member with a line connecting the center of the rotary shaft and the abutting portion is designed to be equal to or greater than 0° and equal to or smaller than 15°, and the abrasion wear of the surface of the bearing and conveying member when in use of the apparatus, the bearing and conveying member has made 10,000 revolutions is designed to be equal to or greater than 0.01 &mgr;m and equal to or less than 1.0 &mgr;m.