An electrophotographic image forming apparatus includes a fixing unit having a heat roller and a press roller which abuts against and presses the heat roller. The image forming apparatus further includes at least one cleaning unit including a backup roller which abuts against and presses the heat roller in order to remove remaining toner attaching to a surface of the heat roller. The backup roller has a two-layer structure of a metal shaft core and a resilient layer, as an outer layer for the shaft core, made of a resilient body. The diameter of the backup roller gradually reduces from a projecting axial center of 10 mm to 30 mm toward two axial ends, so that an entire outer shape of the backup roller forms a crown or spindle like shape.