Image forming apparatus

An image forming apparatus, comprising:

• a finisher that performs at least one finisher processing on a ream of paper on which images have been formed;
• a conveying unit that consecutively conveys the papers on which images have been formed to the finisher;
• a stacking unit that consecutively stacks the papers that are consecutively conveyed by the conveying unit at a processing position where the finisher processing is performed, wherein the stacking unit stacks the papers in such a manner that a portion of the papers is exposed to an outside of the image forming apparatus;
• a discharging unit that makes the finisher perform the finisher processing on the ream of paper when a predetermined number of papers are stacked at the processing position in the stacking unit, and discharges the ream of paper on which finisher processing has been performed to a discharge tray;
• and
• a detecting unit that detects presence or absence of the paper at the processing position in the stacking unit, wherein
• if an execution of the finisher processing is designated, there is no discharging operation of papers by the discharging unit, and if, prior to execution of the finishing processing, the detecting unit detects an absence of paper in the stacking unit, then an occurrence of a paper jam is not recognized and an image forming operation is continued.