An MFP is provided with a main CPU for controlling operation of the MFP according an operating condition set to the MFP, a job management table for sequentially registering input jobs by priority, and a job execution control portion for determining whether or not to permit execution of the job according to the order of registration from a job with high priority that is registered in the job management table. The job execution control portion calculates, based on a job condition of a job intended for permission determination, utilization of the CPU associated with execution of the job, then restricts an operating condition of the MFP in a case where the calculated CPU utilization exceeds a predetermined value, and permits execution of the job according to the restricted operating condition in a case where the CPU utilization when the operating condition is restricted becomes the predetermined value or lower.