The solid-state imaging device of the present invention includes: photodiodes which are two-dimensionally arranged; light condensers each of which condenses light and is provided in a position to correspond to two of the photodiodes which are adjacent to each other; and separating units each of which separates the light entering through the light condensers into first light having a wavelength within a predetermined range, and second light having a wavelength out of the predetermined range, and is provided in a position to correspond to one of the light condensers. Each of the separating units includes: a light-selecting unit which selectively allows transmission of one of the first light and the second light and reflect the other one of the first light and the second light, and allow entering of the transmitted light to one of the corresponding two of the photodiodes; and a light-reflecting unit which reflects the light, reflected by the light-selecting unit, towards the other one of the corresponding two of the photodiodes.