Disclosed is a light emitting device including a substrate, a light emitting structure including lower and upper semiconductor layers having different conductive types, and an active layer disposed between the lower and upper semiconductor layers, the light emitting structure being disposed on the substrate, and a first electrode layer disposed on the upper semiconductor layer, wherein the first electrode layer includes a first adhesive layer and a first bonding layer overlapping each other, wherein a reflective layer is not disposed between the first adhesive layer and the first bonding layer.