PURPOSE: To position an original exactly, by sticking a pin plate having a central line for registering at the time of sticking, onto a photographing glass face, forming a border part on one side of an original forming part, and boring plural pinholes on said border.

CONSTITUTION: The central line 11 for registering the pin plate 10 to be applied on the photographing glass face is formed on the plate 10, and plural positioning pins are formed on the center line-formed side. A border part 22 is formed on the side border of the standardized original forming part 21 of an original paper sheet, and plural pinholes 23 are bored at the border part 22. When a number of printing plates having the number same as that of the plural original paper sheets 20 are formed, the exact positioning of the sheets 20 are executed by setting said pin plate 10 at the prescribed position, and engaging the pinholes with the positioning pins 12.