An image forming apparatus according to one embodiment of the invention includes an image carrier and a cleaning device for cleaning a developer left on a surface of the image carrier. Further, the cleaning device includes: a casing having a rotational shaft; a pressurizing member for applying a force about the rotational shaft to the casing; a cleaning member fixed to the casing for cleaning the developer left on the surface of the image carrier by pressing against the surface by the force about the rotational shaft; a transporting mechanism for transporting the developer in the casing to a position outside of the casing; and a drive mechanism for providing a driving force to the transporting means, and a direction of the driving force is a direction from an application point of the driving force substantially toward a rotational support of the rotational shaft or a direction opposite thereto.