To form a duplication preventible printed matter for preventing forgery by allowing a printed matter made by a color copying machine to be distinctly detected to be a forgery.

The commuter pass 10 is formed having a printed background pattern 12 and a design pattern 14 printed on the background pattern 12. For instance, in the case where the background pattern 12 is colored with orange and the design pattern 14 is yellow-green, since yellow is contained therein as a common color, the yellow-greened design pattern 14 is discolored into yellow and the other parts are decolored as duplicated, it becomes clear as a duplicated matter.