An image sensor includes: a pair of light receiving elements which is disposed for each of two-dimensionally aligned lenses and receives light from a subject, one of the light receiving elements outputting a pixel signal constituting one of captured images in a pair, the other of the light receiving elements outputting a pixel signal constituting the other of the captured images in a pair, the captured images in a pair having a parallax for displaying a three-dimensional captured image of the subject; and a wiring layer disposed between the light receiving elements, the wiring layer including a plurality of wiring lines laminated spaced apart from one another for transmitting an input or output signal to and from the light receiving elements, in which the wiring layer shields light that otherwise goes beyond one picture element to be incident onto another picture element.