A printing apparatus includes a conveyance unit configured to convey a tray on which a printing medium is placed, a printing unit configured to perform printing on a print surface of a printing medium on the tray based on a print job, and a first detection unit configured to detect a relative position relationship between the tray and a printing medium placed on the tray. In addition, a control unit is configured to control the printing unit not to perform printing in a case where the first detection unit detects that the printing medium is not placed at an appropriate position, and a selecting unit is configured to select whether to continue printing irrespective of results of the detection by the first detection unit.