1. An image display method of displaying a plurality of images with overlap on a screen, the method comprising the steps of: seeking to acquire focal position information of each of the plurality of images, wherein the focal position information indicates a focal position of the image corresponding to a point on which a camera was focused during photographing and which is recorded with the image by the camera; registering a region of interest of each image; determining a display position on the screen of each of the plurality of images based on the registered region of interest of the image, such that the region of interest of the image is not hidden by other images; and displaying the plurality of images with overlap on the screen in accordance with the determined display positions, wherein, in a case where focal position information is acquired from an image in said seeking step, a partial area of the image including a focal position indicated by the focal position information is registered as the region of interest of the image, and in a case where focal position information is not acquired from an image in said seeking step, a partial area of the image including a face area of an object contained in the image is registered as the region of interest of the image.