To provide a display device whereby luminance distribution uniformity within a display surface can be improved. A display device of the present invention is provided with: a rectangular display panel, one surface of which displays an image; a substrate, which is disposed to face the other surface of the display panel, said the other surface being on the reverse side of the one surface, and on which a plurality of light sources are mounted; a diffuser plate disposed between the display panel and the substrate; and a supporting member, which has an opening, which light emitted from the light sources passes through, and which supports the peripheral end of the diffuser plate. The display device is also provided with reflecting members, which are respectively provided at the peripheries of the light sources close to four corner portions of the display panel, and which reflect light diffused by the diffuser plate to the corner portions of the display panel.