1. An image display device for selecting and displaying priority images from a plurality of images, comprising: a first determination section for monitoring information that identifies a subject respectively appended to the plurality of images, and detecting subject identification information that has been appended to the most images among the plurality of images as first information; a second determination section for counting a number of items of subject identification information other than the first information, among the subject identification information at the time of shooting that has been respectively appended to the plurality of images, and detecting whether or not a number of the items of subject identification information other than the first information, is more than that of the other images, as auxiliary information; and a third determination section for detecting an image to which the first information has been appended, and which is an image having the auxiliary information, as a priority image.