The image forming apparatus is capable of storing a plurality of jobs in memory, and the stored plurality of jobs are printed and output in the storage sequence. A permitted time for exclusive use of the image forming apparatus to print a first job (print time upper limit) can be set and changed by a user using an operation panel. When the permitted time has elapsed after starting printing of the first job, the first job is interrupted and printing of another job is started. This arrangement prevents delaying the printing of other jobs due to the continuous printing of the first job over a long time period.