Provided is an image-forming apparatus (100) that prevents a drop in processing speed even when a preceding job is interrupted by a simple job (interrupt job). The image-forming apparatus (100) includes a printer unit (120) that prints on paper, a first transporting path (150a) that passes by the printer unit (120), a second transporting path (150b) that path branches off from the first transporting path (150a) and moves paper that has been turned over from front to back further upstream than the printer unit (120), a storage unit (185, 174) that stores a condition table (200) indicates conditions for which a preceding job can be interrupted by an interrupt job, and a system-control unit (192) that references the condition table (200), and when the preceding job can be interrupted, sets a printing order so that printing of the interrupt job is inserted into the printing order of the preceding job.