The present invention provides a light emitting device which is capable of enhancing the radiant intensity on a single direction. The light emitting device comprises a substrate, a lens bonded to the substrate, and an LED chip bonded to the substrate and exposed in a gap clipped between the substrate and the lens, wherein the lens has a light output surface which bulges in a direction that is defined from the substrate toward the LED chip and is contained in a thickness direction of the substrate to transmit the light emitted from the LED chip.