An image capturing apparatus that couples a plurality of images so as to generate a composite image, comprises an image capturing unit which captures images of an object; a determination unit which determines, for each of a plurality of areas into which light receiving portions of the image capturing unit are separated, an exposure condition under which the image capturing unit is exposed; a first composition unit which couples to one another, area by area, the plurality of images that were shot under the exposure condition determined for each area by the determination unit, so as to generate a first plurality of composite images; and a second composition unit which composes the first plurality of composite images generated by the first composition unit so as to generate a single second composite image that has an extended dynamic range.