A semiconductor light emitting device including a second electrode layer; a light emitting unit including a plurality of compound semiconductor layers under one portion of the second electrode layer; a first insulating layer under the other portion of the second electrode; an electrostatic protection unit including a plurality of compound semiconductor layer under the first insulating layer; a first electrode layer electrically connecting the light emitting unit to the electrostatic protection unit; and a wiring layer electrically connecting the electrostatic protection unit to the second electrode layer.