A printer may be provided with a receiving device, a housing portion, a print device, a detecting device, a determination device, and a controller. The receiving device receives a print job including print data and type information specifying the type of print medium. The housing portion houses a print medium that has not been printed. The print device executes a print process that prints an image corresponding to the print data included in the print job on the type of print medium specified by the type information. The detecting device detects whether the housing portion is housing the type of print medium specified by the type information included in the print job. The determination device determines whether the print process based on the print job has been started. The controller controls the print device based on information detected by the detecting device and information determined by the determination device.