An image sensor includes: a plurality of large-defocus detection pixel pairs configured to be used when a displacement of a focus is greater than a predetermined value; and a plurality of normal pixels arranged in a substantially matrix shape and configured to acquire an image. A large-defocus detection line including the large-defocus detection pixel pairs is provided for each of a predetermined number of lines, and on each of the large-defocus detection lines, the plurality of large-defocus detection pixel pairs are configured as a plurality of exit pupil distance-supporting large-defocus detection pixel pairs corresponding to different exit pupil distances.