A semiconductor light emitting device includes: a light emitting structure having a first conductivity-type semiconductor layer, an active layer, and a second conductivity-type semiconductor layer stacked therein along a stacking direction, a transparent electrode layer on the second conductivity-type semiconductor layer and divided into first and second regions, the transparent electrode layer having a plurality of first through-holes disposed in the first region, an insulating reflective layer covering the transparent electrode layer and having a plurality of second through-holes in a region overlapping the second region along the stacking direction, and a reflective electrode layer on the region of the insulating reflective layer and connected to the transparent electrode layer through the plurality of second through-holes.