1. An image evaluation apparatus, comprising: printing status judgment means for judging a printing status of a processing target image assigned with an evaluation value; and evaluation value changing means for decreasing the evaluation value based on information representing the printing status, wherein the information representing the printing status includes information on whether the target image is currently selected for printing and the evaluation value changing means decreases the evaluation value in a case where the target image is currently selected for printing, said evaluation value comprising a value indicating a degree of importance of the target image, and wherein, in said image evaluation apparatus, plural images are classified into plural categories and the evaluation value is calculated based on a number of images in a category of said categories, a number of said categories related to the category, and a number of levels below the category.