To provide an ash melting furnace for improving the melting efficiency of incineration ash.

The ash melting furnace comprising a furnace body having an incineration ash throwing opening for throwing incineration ash inside, and a heating melting means for heating and melting the incinerating ash in the furnace body for turning into melted slug further has a gas-blowing means for blowing gas into the pond of the melted slug where non-melted incineration ash floats.