1. A digital camera comprising: a plurality of image-capturing systems which essentially simultaneously capture images of a single subject at mutually-different angles of view; an associating unit which imparts, to at least one of a plurality of items of image data captured by means of image-capturing actions of the plurality of image-capturing systems, relevant information indicating association with relevant image data which are items of the other simultaneously-captured image data; and a storage unit for storing the image data imparted with the relevant information and the relevant image data as separate items of data.