This solid-state image sensor 10 includes an array of photosensitive cells and an array of dispersing elements. The photosensitive cell array is comprised of multiple unit blocks 40, each of which includes four photosensitive cells 2a, 2b, 2c and 2d. The dispersing element array 100 makes light, obtained by subtracting a complementary color ray of the first color component (C1̂) from the incoming light (W) and adding a light ray with the first color component (C1) to the remainder, incident on the first photosensitive cell 2a, makes light, obtained by subtracting the light ray with the first color component (C1) from the incoming light (W) and adding the complementary color ray of the first color component (C1̂) to the remainder, incident on the second photosensitive cell 2b, makes light, obtained by subtracting a light ray with the third color component (C3) from the incoming light (W) and adding a complementary color ray of the third color component (C3̂) to the remainder, incident on the third photosensitive cell 2c, and makes light, obtained by subtracting the complementary color ray of the third color component (C3̂) from the incoming light (W) and adding the light ray with the third color component (C3) to the remainder, incident on the fourth photosensitive cell 2d.