A solid-state image sensor according to an embodiment of the present disclosure includes a photodetector array 100 in which photodetectors A and B are arranged two-dimensionally within an image capturing plane. Some of those photodetectors B located in multiple different mutually intersecting directions with respect to each photodetector A are adjacent to the photodetector A. The sensor further includes a light-splitting element array 200 in which a plurality of light-splitting elements 30, each including a phase filter 3, are arranged two-dimensionally and which is configured so that each of the light-splitting elements 30 faces an associated one of the photodetectors A. The phase filter 3 makes light falling within a first wavelength range incident on the photodetector A that the phase filter 3 faces, and makes light falling within a second wavelength range incident on the photodetectors B that are adjacent to the photodetector A.