An image forming apparatus includes: an intermediate transfer belt for, by rotation thereof, transferring a toner image on a surface thereof; a cleaner for removing toner particles after the transfer by rotation of a cleaning brush which touches the surface of the intermediate transfer belt and rotated during the transfer; a current supplier for supplying a cleaning current having a predetermined value (I2) to the cleaning brush in accord with the transfer; and a controller for controlling the intermediate transfer belt, cleaner and current supplier. The controller obtains a current time T1 and a previous rotation end time T2 of the cleaning brush, and when a time period during which the cleaning brush has not rotated, which is calculated from the current time T1 and the rotation end time T2, is equal to a predetermined time period or longer, sets the cleaning current to "I1".