To continuously perform a series of works and perfectly automate by moving sheets piled on a sheet stacking tray toward a guillotine cutter, cutting the other end of the sheets into a constant size with the guillotine cutter, and moving the cut sheets in a state of piled on a product table.

A sheet stacking tray 19 can move between a sheet receiving tilting position for receiving sheets cut at a constant position tiltingly in the flow direction and a sheet feeding table horizontal position aligning at the level of paper feeding table of a guillotine cutter 18. A back gage 17 of the tray 19 receives one end of the sheets cut at a constant position and fed, and moves on the tray 19 until the other end of the sheets in an ordered state comes to a position to be cut into a constant size by the guillotine cutter 18. These constant size cutting process, a product blocking process, and a process for clarifying the direction of printing-time products can be integrated. Thus, a series of work processes can be automated.