A light flux control member has: a rear surface extending in the Y-axis direction; and a first incident plane, a second incident plane, and a third incident plane disposed on the rear surface side, said third incident plane reflecting light incident to the first incident plane. The light flux control member further has: a first reflecting plane disposed on the front side and reflecting, to one direction in the Y-axis direction, light incident to the first incident plane, light incident to the first incident plane and reflected on the third incident plane, and light incident to the third incident plane; and a second reflecting plane for reflecting light incident to the second incident plane to the other direction in the Y-axis direction. The light flux control member still further has two exit planes disposed sandwiching the first reflecting plane and the second reflecting plane and facing each other.