A light emitting device 1 according to an embodiment includes a planar alumina substrate, a semiconductor light-emitting element mounted on the alumina substrate, and a phosphor layer. The phosphor layer includes a silicone resin layer provided to cover an upper surface and a side surface of the semiconductor light-emitting element and a phosphor emitting visible light by being excited with light emitted from the semiconductor light-emitting element. The phosphor is dispersed in the silicone resin layer. The alumina substrate has a water absorption rate of 5% or more and 60% or less, and an adhesion strength between the alumina substrate and the silicone resin layer is 1 N or more.