1. An album generating apparatus, comprising: an image storing section for storing a plurality of images; a main image selecting section executed on a processor and connected to the image storing section for selecting a main image that is to be a primary image in an album out of the plurality of images stored in said image storing section; a subsidiary image selecting section executed on a processor and connected to the image storing section for selecting an image related with the main image out of the plurality of images stored in said image storing section as a subsidiary image that is to be subsidiary to the main image in the album selected by said main image selecting section; a layout determining section executed on a processor and connected to the main image selecting section and the subsidiary image selecting section for laying out the main image selected by said main image selecting section and the subsidiary image selected by said subsidiary image selecting section in the album based on contents of the main image selected by said main image selecting section and the subsidiary image selected by said subsidiary image selecting section; an object sampling section executed on a processor for sampling a plurality of objects contained in each of the plurality of images stored in said image storing section; and a relationship judging section executed on a processor for judging that a relationship level of a first object with a second object is high when a number of images containing said first and second objects sampled by said object sampling section is larger than a reference number set in advance in the plurality of objects stored in said image storing section, wherein the subsidiary image selecting section selects the image containing said second object that has been judged by said relationship judging section to be highly related with said first object contained in said main image selected by said main image selecting section as a subsidiary image to be subsidiary to the main image in the album selected by said main image selecting section.