A display device including a semiconductor light emitting device according to an embodiment may include a substrate, a first assembly wiring and a second assembly wiring arranged to be spaced apart from each other on the substrate, a planarization layer disposed on the first assembly wiring and the second assembly wiring and having an opening overlapping the first assembly wiring and the second assembly wiring, a light emitting device including a first electrode placed inside the opening and electrically connected to the first assembly wiring, and wherein the opening includes a main opening and one or more auxiliary openings that are connected to the main opening and are smaller than the main opening.