A light emitting device, comprises: an excitation light source that emits excitation light； a wavelength conversion member that absorbs the excitation light emitted from the excitation light source, converts its wavelength, and releases light of a predetermined wavelength band； a light guide in which the center part (core) of its cross section has a refractive index that is higher than the refractive index of the peripheral portion (cladding), and which guides the light emitted from the wavelength conversion member to the outside； and wherein the wavelength conversion member is produced by laminating a plurality of layers that wavelength-convert different wavelengths of light.
