A foam-holding body 52 having a large difference in refractive index
between foams 521 and the surrounding material is disposed on the major
light extraction surface of the sapphire substrate 50. The foam-holding
body 52 has translucency to light of a light-emitting wavelength and is
formed of a material such as a silicone or the like, having a refractive
index equal to or more than 1.77, and includes a foam-holding layer
holding a plurality of foams made of an air or an inactive gas having a
refractive index of about one. Therefore, when the light emitted in the
light-emitting portion scatters in the foam-holding body 52, the spread
of the scattered light becomes wide, which restricts repetition of the
total reflection in the light-emitting device to improve an efficiency of
the light extraction.