Discussed is a display device including a wiring substrate having a first substrate layer and a second substrate layer, a conductive adhesive layer configured to cover the wiring substrate, and a plurality of semiconductor light emitting devices coupled to the conductive adhesive layer, and electrically connected to a first electrode and a second electrode, wherein the first electrode is disposed at the first substrate layer, and the second substrate layer includes one surface facing the conductive adhesive layer and the other surface covering the first electrode, and an auxiliary electrode electrically connected to the first electrode and the second electrode are disposed on one surface of the second substrate layer.