To improve the light emitting efficiency of a block hybrid light emitting device (LED) that mounts to one submount element a block light emitting device having a plurality of light emitting devices, and to provide an illumination light source for ac driving that uses the same.

This block hybrid light emitting device mounts and electrically connects a block white light emitting device 22 to a submount device 13 having an A1N ceramic substrate 9, wherein by the synergy of the Ag electrode film effect of a p-side electrode 6a, the grooving effect of a sapphire 4, the light absorption-less effect and heat dissipation effect of an A1N ceramic substrate 9, the heat dissipation effect of a bump electrode 8a under an anode electrode and the like its light emitting efficiency is improved by 20%×20%×20%+α, i.e., 80% or more. Further, a block hybrid LED can easily compose a light source for illumination that is driven by ac 100V.