A light emitting device using the light emitting device and a vehicle headlamp lighting

A light-emitting device, light emitted from the excitation light, excites the phosphor and absorbs the light after the light emission combination. As the phosphor, to α-sialon represented by the formula (Caα, Euβ) (Si, Al) 12 (O, N) 16 as a main component represented by a specific surface area of ​​0.1 ~ 0.35m2 / g phosphor, wherein, 1.5 <α + β <2.2,0 <β <0.2, O / N≤0.04. The light emitting apparatus, even in high temperature environments, the color change with less temperature change, and the effective light emission, especially for a vehicle headlight lamp and the like.