The CD-R print system 10 has a shape identical to the CD-R and the like, and the scale marks are printed on the adjustment medium AM with the base line BL previously printed thereon. The user inputs portions of the scales overlapping with the base line BL to the CD-R print system 10 via the user interface. Then, the CD-R print system 10 determines an amount of misalignment of print position based on the input information. The CD-R print system 10 reflects this amount of misalignment to generate print data. Such CD-R print system 10 enables the print position to be readily adjusted with accuracy without using a rule or the like.