Printing apparatus, a printing method, a program and a printing system

A print data generating device comprises a retrieving unit, a bar code data generating unit, and a print data generating unit. The retrieving unit is configured to retrieve image data of an original image. The bar code data generating unit is configured to generate, based on the image data of the original image, data of at least one bar code that stores the original image. The print data generating unit is configured to generate, based on the image data of the original image and the data of the at least one bar code, print data of a print image that includes the at least one bar code arranged on one page and the original image arranged on one or more pages.