A light emitting device including first, second, and third light emitting parts disposed one over another and each including an n-type semiconductor layer, an active layer, a p-type semiconductor layer, a first adhesion layer disposed between the first and second light emitting parts and including first coupling patterns that are adhesive and conductive, and a second adhesion layer disposed between the second and third light emitting parts and including second coupling patterns that are adhesive and conductive, in which the third light emitting part has a mesa structure exposing a portion of the second coupling patterns of the second adhesion layer.