An embodiment provides a display device including transistors disposed on a substrate; an insulating layer disposed on the transistors; a first electrode disposed on the insulating layer and electrically connected to at least one of the transistors; a partition wall disposed on the insulating layer, and a common layer disposed on the partition wall and the first electrode, wherein the partition wall includes a groove, the groove has a shape having an inner width wider than an inlet width, and the common layer is disposed inside the groove.