Disclosed herein is a light-emitting device. The light-emitting device includes a substrate; a first light-emitting unit and a second light-emitting unit, separately formed on the substrate; a trench between the first and the second light-emitting units, including a bottom portion exposing the substrate; an insulating layer, conformably formed on the trench and covering the bottom portion and sidewalls of the first and the second light-emitting units; and an electrical connection, formed on the insulating layer and electrically connecting the first and the second light-emitting units. The electrical connection includes a bridging portion covering the trench and a joining portion extending from the bridging portion and formed on the first and the second light-emitting units; wherein the bridging portion is wider than the joining portion; wherein a part of the insulating layer is formed under the joining portion.