An image forming apparatus includes an image carrying member, a charging roller for charging the image carrying member, a charging roller cleaning roller, and first and second shaft bearings. The charging roller cleaning roller contacts and cleans a surface of the charging roller. The first shaft bearing rotatably holds a rotation shaft of the charging roller cleaning roller, while the second shaft bearing rotatably holds a rotation shaft of the charging roller. The second shaft bearing integrally includes a first shaft bearing holding member which movably holds, by use of a resilient member, the first shaft bearing in a direction of moving the charging roller towards and apart from the charging roller cleaning roller.