According to one embodiment, an organic EL device includes an insulating substrate including a first main surface and a second main surface, a switching element formed on the insulating substrate at the first main surface side, a first electrode electrically connected to the switching element, a second electrode opposed to the first electrode, an organic luminescent layer disposed between the first electrode and the second electrode, a reflective plate disposed between the insulating substrate and the first electrode, and a conductive film covering the second main surface of the insulating substrate.