A display device is capable of preventing light that is incident from a light guide plate from leaking through a gap between optical sheets and an optical-sheet holding member. The optical sheets include a plurality of sheet units. A storage unit for storing the flanges of the optical sheets has a sub-storage unit for storing the flanges of some sheet units. The flange of the other sheet unit excluded from the aforementioned some sheet units is larger than the sub-storage unit. When the flanges of the some sheet units are stored in the sub-storage unit, the flange of the other sheet unit is stored in the storage unit so as to cover the sub-storage unit and the some sheet units.