A printing system includes a printing unit performing printing on a sheet, a conveyance mechanism, a control unit, and a selection unit causing a user to select any one of a plurality of methods whose maximum numbers of sheets existing in the conveyance mechanism at the same time are different from each other. The control unit controls the printing unit and the conveyance mechanism to perform double-side printing processing depending on any one of the methods. The control unit performs double-side printing processing in accordance with the method selected by the selection unit.