PURPOSE: To connect a piezoelectric ignition device with a part generating sparks without using any high voltage cable.

CONSTITUTION: A main body case 1 and a combustion cylinder 11 are made of insulation material. A nozzle member 3, a mixture gas generating member 4, an electrical conductive pipe 7, a guiding cylinder 9, an injection part 10, a closing plate 12, a dispersion plate 15 and an ignition part 16 are made of electrical conductive material. An earth plate 17, a tongue piece 18, an iron tip 19, a cover 20 and a cap 21 are made of electrical conductive material. A lead line 30 at a (f) side of the piezoelectric ignition device 28 is inserted into the electrical conductive pipe 7. A lead line 31 at (-) side is arranged at a male threaded part 27 and connected to the cap 21. When an ignition button 29 is pressed, a spark is generated between the ignition part 16 and the tongue piece 18.