An image layout generating apparatus includes: a first image arranging unit for extracting a first piece of image data from a plurality of image data, and arrange a first image; an image data extracting unit for extracting a new piece of image data; an arranged image selecting unit configured to calculate an inter-image distance between the new piece of image data and image data of each arranged image, and select one of the arranged images; a second image arranging unit configured to arrange a new image to be above, below, left, or right of the selected arranged image by adjusting a size while maintaining an aspect ratio of the new image; and a size adjusting unit configured to adjust the sizes while maintaining the aspect ratios of all the arranged images so as to configure one set of images in which all of the arranged images overall form a rectangle.