There is provided a nitride semiconductor light emitting device, capable of improving light extraction efficiency through a texture effect and including: a light emitting structure formed on a substrate and including a first conductivity-type nitride semiconductor layer and a second conductivity-type nitride semiconductor layer with an active layer interposed therebetween; a first electrode electrically connected to the first conductivity-type nitride semiconductor layer; a second electrode electrically connected to the second conductivity-type nitride semiconductor layer; and a light extraction pattern disposed between the first electrode and the second electrode and including a plurality of through holes formed by vertically penetrating the light emitting structure.