A light incident on one side surface of a prism is reflected twice between an inner surface of the other side surfaced of the prism and an inner surface of the one side surface of the prism. The reflected light is emitted from the rear surface of the prism to form an image on an image pickup element through the image pickup lens. A first reflective member disposed on a substantially entire other side surface of the prism totally reflects the light incident on the inner surface of the other side prism. A second reflective member disposed on an area, of the one side surface of the prism, in which the light incident on the inner surface of the one side prism is not totally reflected totally reflects the light incident on the inner surface of the one side prism.