A printing apparatus having an insert-sheet inserting function includes a plurality of sheet-feeding ports, a printing mechanism that performs printing on paper fed from each sheet-feeding port, and a controller that controls the printing mechanism. In a case where no insert-sheets are present in a sheet-feeding port for insert-sheets when the printing mechanism feeds the insert-sheets from the sheet-feeding port for insert-sheets, the controller selects another sheet-feeding port different from the sheet-feeding port for insert-sheets as a new sheet-feeding port for insert-sheets on the basis of a paper specification of paper used for printing data to be printed and a sheet-feeding port setting.