1. An image processing device comprising: an image inputting unit that is connected to an image data generating device that generates image data, and that inputs the image data generated by the image data generating device, a storing unit that stores at least one form data, a plurality of image data, and at least one format data; a selecting unit that selects a form data and a format data from among the form data and the format data stored in the storing unit based on number of image data; and an image combining unit that combines the image data, selected form data and format data to generate a combined output image, wherein the image combining unit includes a combined-image outputting unit that, every time when one page of the combined output image is generated by the image combining unit, outputs the generated one page of the combined output image out of the combined output image.