To provide a sheet guide in a printing machine which guides a printing material evenly to a sheet guiding cylinder and also ensures further excellent passing of the printing material through a printing slit or a varnishing slit formed by a rubber blanket cylinder or a plate cylinder and by the sheet guiding cylinder in a printer or a varnisher not being used in a printing process or a varnishing process, regarding the sheet guide in the printing machine for guiding the printing material in the area formed between the rubber blanket cylinder or the plate cylinder and the sheet guiding cylinder in the printer or the varnisher not being used.

In the printer 1 or the varnisher 2 or 3, the rubber blanket cylinder 9 or the plate cylinder 10 is constituted to be supported by a frame 15 provided as a separate body, and the frame 15 is made movable on at least one guiding track 18 provided on the lateral support 16 thereof.