A light emitting device including: a substrate; first and second light emitting units disposed on the substrate separate from each other and respectively including first and second light emitting diodes, on which first and second wavelength converters are respectively disposed; first and second bonding layers interposed between the substrate and the first and second light emitting units, respectively; a sidewall disposed surrounding and adjoining side surfaces of the first and second light emitting units; and a filler evenly disposed in the sidewall and capable of reflecting light from the first and second light emitting units, wherein the substrate includes plurality electrodes, wherein a first portion of the sidewall directly contacts both of the first light emitting diode and the second light emitting diode, and wherein a second portion of the sidewall separates and directly contacts the first wavelength converter and the second wavelength converter.