Abstract: A device for injecting gas into a hot melt, particularly molten metal, is suitable for being installed in the wall, particularly the bottom wall, of the container holding the melt. The device has three main sections includinga front section of refractory material which is resistant to the melt in question, and which has a number of perforations (10) for introduction of gas into the melt,a middle section which at least partly consists of heat conductive material and possesses a number of perforations communicating with the perforations of the front section, anda rear section at least the outer (peripheral) part of which is of heat conducting material, which rear section in or close to its peripheral part has a helical duct communicating with the perforations of the middle section and adapted to pass the gas from an external gas source.