Provided are a light emitting device, a light emitting device package, and a light unit. The light emitting device includes a support substrate, a light emitting structure layer disposed on the support substrate, the light emitting structure layer including a first conductive type semiconductor layer, a second conductive type semiconductor layer, and an active layer disposed between the first conductive type semiconductor layer and the second conductive type semiconductor layer, an electrode electrically connected to the first conductive type semiconductor layer, and a volume layer disposed on the light emitting structure layer, the volume layer having a thickness greater than a thickness of the electrode.