A printing apparatus, including an image reader unit, a printer unit, and a controller, is provided. The controller executes an image reading process; a printing process; a standby process to hold the printer unit in a second condition, wherein the printer unit is enabled to print through a preparatory action, on standby during a time period between completion of the printing process and elapse of a standby period; a shifting process to shift the printer unit from the second condition to a first condition, wherein the preparatory action is required to enable the printer unit to print; and a changing process, wherein, if a document cover in the image reading unit is open during the time period between the completion of the printing process and elapse of the standby period, the standby period is changed from a first period to a second period that is longer than the first period.