A light emitting device is provided that may include a light emitting structure including a first conductivity-type semiconductor layer, an active layer provided on the first conductivity-type semiconductor layer, and a second conductivity-type semiconductor layer provided on the active layer, a first electrode that conductively contacts the first conductivity-type semiconductor layer, an insulating layer provided on a portion of the light emitting structure and the first electrode, and a second electrode that conductively contacts the second conductivity-type semiconductor layer, the first electrode including a first portion protruding from a side surface of the first conductivity-type semiconductor layer.