PURPOSE: To enhance safety by interrupting the dishcarge of raw gas, by stopping the supply of gas to all of the burners at the time of misfire or ignition failure at any one of the burners by the action of a solenlid valve provided to serve a plurality of burners.

CONSTITUTION: Contact point 9a is closed by manipulating the thumb nut 11 of the timer 9, and the solenoid valve 2 is opened by the sufficient flow of electric current. Contact point 9b is opened after an elapse of a short time setting, and the burner cock 5 is opened ignited by manipulating thumb nut 6. Ignition of other burners is made by the followed manipulation of the thumb nut 6 when it is made within the set time of the previous ignition. For example, when burner A causes misfire, it opens its ignition detection part member 8a, and because the cock switch 7a which corresponds to it is in the state of opening, electric current to the solenoid valve 2 is interrupted, and is closed automatically. By this constitution, gas supply to all of the burners is discontinued.