1. An album generating apparatus, comprising: one or more processors configured to execute a process comprising: an image storing step of storing images; a layout determining step of laying out the stored images in said image storing step per page in the album; and a main image selecting step of selecting one of the images that are laid out in a predetermined page of the album by said layout determining step as a main image of the predetermined page, wherein the stored images are correlated with image capturing time and image capturing position of the images, and the executed process further comprises: judging importance of the image capturing time and image capturing position in the plurality of stored images; and sorting the plurality of stored images per page in the album based on the image capturing time when the importance of the image capturing time is judged to be greater than that of the image capturing position, wherein the images sorted per page are laid out to each page of the album, and wherein the image storing step correlates the stored images with image capturing time and image capturing position of the images, and the executed process further comprises: an importance judging step of judging importance of the image capturing time and image capturing position in the plurality of images stored in said image storing step; an image capturing time sorting step of sorting the plurality of images stored in said image storing step per page in the album based on the image capturing time stored in said image storing step when the importance judging step judges that the importance of the image capturing time is greater than that of the image capturing position, wherein the layout determining step lays out the images sorted per page by said image capturing time sorting step to each page of the album.