A light emitting device for a vehicle light fitting unit , the light emitting device comprising: an excitation light source configured to generate excitation light; a wavelength conversion member configured to absorb the excitation light and convert a wavelength of the excitation light to emit light in a predetermined wavelength region; a light guide configured to direct the excitation light from the excitation light source to the wavelength conversion member ; and a ferrule ; wherein the ferrule is a member for holding the light guide ; wherein the wavelength conversion member is arranged on an upper surface of the ferrule and includes at least a first surface , a second surface facing the first surface , and a peripheral end surface arranged between the first surface and the second surface , wherein the light guide is configured to direct the excitation light from the excitation light source to the first surface , wherein second reflection means is arranged on an upper surface of the ferrule and around the first surface of the wavelength conversion member and extends outside of an outside diameter of the first surface of the wavelength conversion member and covers at least part of the first surface of the wavelength conversion member , characterized in that the wavelength conversion member is a disc-shaped wavelength conversion member , wherein at least part of the peripheral end surface is cut and the cut surface is covered by third light blocking means , or a triangular-prism wavelength conversion member , wherein an inclined surface of the triangular-prism wavelength conversion member is the second surface , and that when the excitation light is emitted to the first surface , the light emitted from the wavelength conversion member is emitted only from the peripheral end surface and that the second surface is covered by first light blocking means . an excitation light source configured to generate excitation light; a wavelength conversion member configured to absorb the excitation light and convert a wavelength of the excitation light to emit light in a predetermined wavelength region; a light guide configured to direct the excitation light from the excitation light source to the wavelength conversion member ; and a ferrule ; wherein the ferrule is a member for holding the light guide ; wherein the wavelength conversion member is arranged on an upper surface of the ferrule and includes at least a first surface , a second surface facing the first surface , and a peripheral end surface arranged between the first surface and the second surface , wherein the light guide is configured to direct the excitation light from the excitation light source to the first surface , wherein second reflection means is arranged on an upper surface of the ferrule and around the first surface of the wavelength conversion member and extends outside of an outside diameter of the first surface of the wavelength conversion member and covers at least part of the first surface of the wavelength conversion member , characterized in that the wavelength conversion member is a disc-shaped wavelength conversion member , wherein at least part of the peripheral end surface is cut and the cut surface is covered by third light blocking means , or a triangular-prism wavelength conversion member , wherein an inclined surface of the triangular-prism wavelength conversion member is the second surface , and that when the excitation light is emitted to the first surface , the light emitted from the wavelength conversion member is emitted only from the peripheral end surface and that the second surface is covered by first light blocking means . <EOS>