1. An image forming apparatus that develops a latent image on a rotationally driven latent image carrier by a developing unit using a toner when receiving an input of an image forming job, transfers a toner image thus obtained onto a recording material, and performs a cleaning process of removing an unnecessary substance adhering to the latent image carrier by rubbing the rotationally driven latent image carrier by a cleaning member, comprising: a job interruption control unit that, when an input of a continuous image forming job for continuously forming an image on a plurality of recording materials is received, decides timing for interrupting the continuous image forming job based on an image area ratio of a toner image formed on the latent image carrier through the continuous image forming job and a predetermined number of formed images that is formed until a predetermined type of abnormal image is generated when the continuous image formation is performed with the image area ratio; and during an interruption period of the continuous image forming job, performs an idle rotation in which the latent image carrier rotates in a state in which the toner is not supplied to the latent image carrier by the developing unit to perform the cleaning process.