An organic light emitting device is disclosed. The organic light emitting device includes a substrate, a display positioned on the substrate, and a dummy pattern positioned at an edge of the display. The display includes a plurality of subpixels each including a first electrode, an emissive unit including at least an organic emissive layer, and a second electrode. The dummy pattern includes a dummy layer including the same formation material as that of at least one of a plurality of layers for forming the emissive unit.