To adopt a burner system with high thermal efficiency, to enable heating in a clean atmosphere, to uniformize the heating temp. and to enable the use without problems even under using conditions in rapid heating and rapid cooling as to a firing furnace in which firing for a product applied with glass lining is mainly executed.

This is a bath type firing furnace for glass lining composed of a furnace main body 1 and a hearth 2, in which radiant tubes 3 are approximately uniformlly arranged on the whole body of the furnace main body 1 and hearth 2, furthermore, the arranged radiant tubes are individually capable of controlling the temp. and are composed of heat resistant metal withstanding rapid heating and cooling.