To solve the point at issue that, when the non-feed of a manuscript or the forward feed jamming of the manuscript occurs, only the treatment of manuscript may be performed at the region where the non-feed or forward feed jamming occurs but, actually not only the treatment of the manuscript but also master treatment on the way of plate discharge or master treatment of plate making must be performed and treatment work becomes extremely troublesome.

A printing apparatus has a control unit which rotates a manuscript feed roller 11 by starting a stepping motor 11A based on the starting signal from a plate making start key to feed the manuscript 20 prior to at least one operation among plate discharge operation, plate making operation, plate feed operation and paper feed operation and subsequently judges whether the leading end of the manuscript 20 is fed to a position detected by a manuscript leading end detection sensor 13 based on the detection presence signal of the leading end of the manuscript 20 from the manuscript leading end detection sensor 13.