A light emitting device may include a substrate; a body which is disposed on the substrate and has a first hole having a predetermined size and a light emitting chip which is disposed within a cavity formed by the substrate and the first hole of the body. A cap may be disposed on the body and may have a second hole having a predetermined size. A transparent window may be disposed in the second hole. A lower portion of the cap is divided into a first surface and a second surface more projecting downwardly than the first surface, and at least a portion of the first surface is attached and fixed to the body.