A reliable semiconductor light-emitting apparatus including an optical fiber and a wavelength converting layer and a headlight using the semiconductor light-emitting apparatus can include a ferrule holder attaching the wavelength converting layer. The ferrule holder can also attach a first ferrule covering the optical fiber, which transmits light emitted from a semiconductor light-emitting chip toward the wavelength converting layer. When the light-emitting apparatus is used for the headlight, the apparatus can be easily incorporated into a prescribed position of the headlight with confidence via a lamp holder. Thus, the disclosed subject matter can provide reliable semiconductor light-emitting apparatuses having a high radiating efficiency that can emit various color lights including a substantially white color tone having favorable optical characteristics, which can be used for general lighting, a street light, stage lighting and the like, and which can be used for the headlight that can provide a favorable light distribution pattern.