A cleaner in a transfer section of a copying machine for cleaning a soil toner transferred from a photoconductive member and adhering to the surface of a transfer drum, which includes a cleaning device which electrically attracts and cleans the soil toner on the surface of the transfer drum and an electrode disposed at the interior surface of the transfer drum for weakening the electrostatic force between the soil toner and the surface of the transfer drum. The electrode disposed in the interior of the dielectric drum is movable.