Belt Cleaner is cleaning device for belt conveyor which carries various materials and/or fuel in steel mill, thermoelectric power plant, cement factory, mine etc. Lots of scraps and floating particles of dust adhere to the surface of the return belt of conveyor which carries many kinds of material and, scraps or floating particles of dust even adhere to the snap belt and the return roller as well. The adhesion of such scraps and particles increases the diameter of pulley irregularly to cause meandering and rolling of belt and, in worst case, the belt will be out of order. Also, scraps and floating particles of dust not only dirty the facility but also cause pollution. Following effect will take place if clean the surface of belt using Belt Cleaner.