Provided is a light guide plate that is suited for a compact illumination device emitting high-grade light and that allows the orientation thereof to be recognized with ease, an illumination device equipped with the light guide plate, and a display device equipped with the illumination device. Two protrusions (12A, 12B) are formed on a light-receiving face (11r) of a light guide plate (11), and these protrusions (12A, 12B) serve as a recognition member that allows the orientation of a top surface (11u) of the light guide plate (11) to be recognized.