Light emitting device

Disclosed is a light emitting device including a substrate (110), a plurality of light emitting cells (100) separated from each other and disposed on the substrate, and a plurality of conductive interconnection layers (170) electrically connecting two neighboring light emitting cells. Each light emitting cell includes a light emitting structure (120) including a first conductivity-type semiconductor layer (122), an active layer (124) and a second conductivity-type semiconductor layer (126), a first electrode (130), a second electrode (140), and an etching area (S), and the light emitting structure further includes a first side surface (120a) and a second side surface (120b), and if a width between the first side surface and the second side surface is defined as W, the second electrode is disposed in an area between a position separated from the first side surface by 1/5 W and a position separated from the first side surface of the light emitting structure by 1/2 W.