A display device includes a transistor disposed on a substrate and including a gate electrode, a channel region, a source region, and a drain region; a first insulating layer disposed on the transistor; a drain electrode that electrically contacts the drain region through an opening formed in the first insulating layer; a connection electrode disposed on the drain electrode and electrically contacting the drain electrode; a second insulating layer disposed on the first insulating layer, an upper surface of the second insulating layer and an upper surface of the connection electrode forming a flat surface that is parallel to the substrate; a pixel electrode disposed on the flat surface and electrically contacting an upper surface of the connection electrode; an emission layer disposed on the pixel electrode; and a common electrode disposed on the emission layer.