To reduce and attenuate the thermoacoustic pressure vibration by connecting the output terminal of a controller to means for electrically controlling the flame in a combustion chamber.

Fuel is supplied via a fuel conduit 5 and combustion air is suppled via an air intake port 4 to a burner 3, and the thermoacoustic pressure vibration generated by the irregular combustion of a flame 16 is detected by a pressure sensor 6 provided in a combustion chamber 1. A voltage source 11 and an electrode 14 are connected to the sensor 6 via a controller 10, and the electrode 14 is conductively connected to a thermal insulating shield 12 which is insulation-installed. Thus, the thermoacoustic vibration pressure relative to the load generated by the combustion of the flame 16 can be controlled to as to be lowered and attenuated.