A semiconductor light-emitting device includes a semiconductor light-emitting element which is capable of emitting light, a fluorescent substance which is capable of absorbing at least part of light emitted from the semiconductor light-emitting element and also capable of subsequently converting the wavelength of the absorbed light and emitting the light having a converted wavelength, and a light-transmissive sealing material encapsulating the semiconductor light-emitting element, formed of an inorganic material having, at least partially, a silicon-nitrogen linkage and including a fluorescent substance.