A printing apparatus capable of processing a print job and forming an image on a recording sheet based on the print job is provided. The printing apparatus includes a first determining system to examine an image-forming condition of the printing apparatus and determine as to whether the printing apparatus is under a condition of lowered image-forming quality, a second determining system to examine attribute of the print job and determine based on the attribute as to whether the print job meets restrictive requirement, by which the print job is restricted from being executed, when the printing apparatus is under the condition of lowered image-forming quality, and a restricting system to restrict execution of the print job at least partially when the second determining system determines that the print job meets the restrictive requirement.