The present invention provides a display device, including a display unit having a plurality of semiconductor light emitting devices and outputting light to an upper surface thereof, a transparent substrate located on an upper side of the display unit and having a fixing portion protruding from one surface thereof to surround a side surface of the display unit, a protective layer formed to cover a lower surface of the display unit, and a back cover coupled to a part of the transparent substrate and the protective layer in an injection manner, wherein the protective layer is located to cover the fixing portion.