An image sensor includes; a substrate including a first surface and a second surface; a first pixel region; a second pixel region; a third pixel region; a first lens on the first pixel region; a second lens on the second pixel region and the third pixel region; an element separation film in the substrate and being interposed between the first pixel region and the second pixel region; a first color filter to transmit light focused by the second lens to the second pixel region and the third pixel region; a color filter grid forming a region in which the first color filter is provided. The color filter grid includes a metal layer; and a protective film on the color filter grid and in contact with the first lens and the second lens. The first lens is on the second surface.