When data is input, print setting information of the data is preserved, and if two pieces of previous and present print setting information are not present, print job data starts to be created, and job start “JS”, print setting information, printing command, image data are added. On the other hand, if two pieces of previous and present print setting information are present, it is judged whether or not the previous and present print setting information are the same as each other. If both the pieces of the print setting information are the same as each other, printing command and image data are added to print job data during creation. In this case, a setting unit omits settings of processing conditions which a printing unit uses for a printing process, performed based on the print setting information, for subsequent data.