A light emitting device used in a vehicle light fitting, the light emitting device comprising: a first holding member holding: a first light guide including a first light entering surface and a first light emission surface, the first light guide being configured to guide excitation light guided inside from the first light entering surface to the first light emission surface to emit the excitation light from the first light emission surface; and a wavelength conversion member configured to absorb the excitation light emitted from the first light emission surface and convert a wavelength to emit light in a predetermined wavelength region; a second holding member holding a second light guide including a second light entering surface and a second light emission surface, the second light guide being configured to guide excitation light guided inside from the second light entering surface to the second light emission surface to emit the excitation light from the second light emission surface; an excitation light source configured to generate the excitation light guided inside of the second light guide from the second light entering surface; and fixation means (95, 96); characterized in that fixation means include an adapter and a connector; wherein the first holding member includes a flange formed between the first light entering surface and the first light emission surface, wherein the adapter includes a sleeve formed thereon, wherein a lower side of the first holding member is inserted to one side of the sleeve of the adapter until the flange comes into contact with the adapter, and the first holding member is fitted together with the adapter, wherein an upper surface of the second light emission surface of the second holding member is inserted to the other end of the sleeve of the adapter until the upper surface hits a lower surface of the first light entering surface of the first light guide, and the second holding member is fitted together with the adapter, and wherein the connector removably fixes the first holding member and the second holding member in a state in which the first light entering surface and the second light emission surface face each other. a first holding member holding: a first light guide including a first light entering surface and a first light emission surface, the first light guide being configured to guide excitation light guided inside from the first light entering surface to the first light emission surface to emit the excitation light from the first light emission surface; and a wavelength conversion member configured to absorb the excitation light emitted from the first light emission surface and convert a wavelength to emit light in a predetermined wavelength region; a second holding member holding a second light guide including a second light entering surface and a second light emission surface, the second light guide being configured to guide excitation light guided inside from the second light entering surface to the second light emission surface to emit the excitation light from the second light emission surface; an excitation light source configured to generate the excitation light guided inside of the second light guide from the second light entering surface; and fixation means (95, 96); characterized in that fixation means include an adapter and a connector; wherein the first holding member includes a flange formed between the first light entering surface and the first light emission surface, wherein the adapter includes a sleeve formed thereon, wherein a lower side of the first holding member is inserted to one side of the sleeve of the adapter until the flange comes into contact with the adapter, and the first holding member is fitted together with the adapter, wherein an upper surface of the second light emission surface of the second holding member is inserted to the other end of the sleeve of the adapter until the upper surface hits a lower surface of the first light entering surface of the first light guide, and the second holding member is fitted together with the adapter, and wherein the connector removably fixes the first holding member and the second holding member in a state in which the first light entering surface and the second light emission surface face each other.