A light guiding plate guides light from a light source and irradiates the light onto a display portion. The light guiding plate has an exit plane facing the display portion, and a reflection-exit plane opposite to the exit plane. The reflection-exit plane has a first end intersecting the incidence plane and a second end intersecting the opposite end plane. An inclination angle defined by the incidence plane and a line that contains the first end and the second end is greater than 0.2° and less than 0.75°. The reflection exit plane includes a light admission portion that reflects light entering through or reflected on the incidence plane to the exit plane. This minimizes the parallax to an invisible level to improve the visibility while improving the uniformity of the brightness distribution.