A solid-state image sensor includes a dispersing element array which is arranged to face a photosensitive cell array and which includes a plurality of high-refractive-index transparent portions, a low-refractive-index transparent layer that fills a gap between the high-refractive-index transparent portions, and pairs of dispersing elements arranged to face multiple unit blocks of the photosensitive cell array. Each pair of dispersing elements is comprised of: a first dispersing element which includes one of the high-refractive-index transparent portions and which splits incoming light into two light rays representing first and second color components, respectively; and a second dispersing element which includes another one of the high-refractive-index transparent portions and which splits the incoming light into two light rays representing third and fourth color components, respectively.