Surface light source apparatus to suppress brightness unevenness

The brightness unevenness of the surface light source device is suppressed. The feature of the surface light source apparatus includes: a first light guide plate, a second light guide plate, a reflection sheet, a first light source, a second light source, and a light source driving circuit; wherein the first light guide plate has: a light guide unit, and a first optical control unit disposed at a farther side of the light guiding portion than the first light source and deflecting the light toward a specific direction and emitted from the first light guide plate; the second light guide plate has: a second optical control unit that deflects light in a specific direction and emits the light from the second light guide plate, and a light-transmissive portion that is disposed at a farther side of the second light source than the second optical control unit. In the stacking direction, the first light guide plate and the second light guide plate are disposed such that the first optical control unit overlaps with the