An embodiment provides a light emitting element comprising: a first conductive semiconductor layer including a first layer and a second layer; an active layer on the first conductive semiconductor layer; a second conductive semiconductor layer on the active layer; and a first electrode and a second electrode arranged on the first conductive semiconductor layer and the second conductive semiconductor layer, respectively, wherein the first layer includes a plurality of first grooves, and a growth prevention layer is arranged on the bottom surface and side surfaces of each of the first grooves.