A reliable semiconductor light-emitting apparatus and a headlight using the light-emitting apparatus provided with a light source module including a semiconductor light-emitting device and a wavelength converting module including a wavelength converting layer. The wavelength converting module can include a base having a mounting board, which mounts the wavelength converting layer via metallic bumps, and the base can be configured to attach the light source module directly or via a connecting guide including an optical fiber, and therefore can transmit light emitted from the light-emitting device towards the wavelength converting layer while efficiently radiating heat generated from the wavelength converting layer. Thus, the disclosed subject matter can provide reliable semiconductor light-emitting apparatuses having a high thermal resistance that can emit various color lights having favorable optical characteristics, which can also include the optical fiber, and which can be used for the headlight that can provide a favorable light distribution pattern.