An image forming apparatus includes: a plurality of paper supplying trays; an image forming unit; and a cover. The image forming apparatus further includes a cover opening/closing detecting unit that detects an operation for opening/closing the cover; a paper supplying tray opening/closing detecting unit that detects an operation for opening/closing the paper supplying tray; a paper jam detecting unit that detects a paper jam in at least one place in a paper transporting path; a paper jam release deciding unit that decides whether the paper jam in the detecting place is released or not after the confirmation of a detection; and a completion control unit that controls to complete a paper jam processing based on the decision that the paper jam in all of the places in the paper transporting path is released through the paper jam release deciding unit.