A light guiding plate includes a light incident portion into which light is incident from a light source, a light reflecting pattern to reflect the light provided from the light incident portion, and a light transmitting surface to transmit the light reflected by the light reflecting pattern to a display panel. The light reflecting pattern includes light reflecting sections each of which has a first light reflecting plane that is inclined with respect to the light transmitting surface to face toward the light source, and a second light reflecting plane that is inclined with respect to the light transmitting surface and connected with an edge of the first light reflecting plane so that the light reflection sections each form a prism shape. The light reflecting sections respectively having the second light reflecting planes that are configured to have different areal sizes to control reflectivity of the respective light reflecting sections.