A display device with high display quality is provided. The display device includes a plurality of light-emitting devices each including a pixel electrode, a light-emitting layer, a functional layer, a common layer, and a common electrode in this order and includes an insulating layer positioned between side surfaces of the light-emitting layers adjacent to each other. The light-emitting layer and the functional layer each having an island shape are provided in each light-emitting device, and the plurality of light-emitting devices share the common layer. The common layer and the common electrode are provided to cover the insulating layer. In a cross-sectional view, an end portion of the insulating layer has a tapered shape with a taper angle greater than 0° and less than 90°.