There is provided a method of manufacturing a light emitting device, the method including: mounting a plurality of light emitting devices on an adhesive layer; arranging upper surfaces of the plurality of light emitting devices to be disposed horizontally using a pressing member; forming a wavelength conversion part covering the plurality of light emitting devices on the adhesive layer by applying a resin including at least one phosphor material; planarizing an upper surface of the wavelength conversion part using the pressing member; and separating the adhesive layer from the plurality of light emitting devices.