To provide an image processor, an output control system, an output control method, and an output control program for performing output control of shared jobs.

An image processor 100 outputs shared jobs which are accumulation jobs in which sharing by a plurality of users is set, has: job list display means 23 for displaying a job list generated based on job information on the accumulation jobs; and job control means 24 for controlling output of an execution job selected from the job list, in which the job list display means 23 displays a shared job determined that execution in the image processor is permitted based on a permission condition set in job sharing among the shared jobs included in the job list, and the job control means 24 outputs job data on the shared job selected as the execution job according to an output form specified in job execution from the job list displayed by the job list display means.