PURPOSE: To improve the safety of the ignition operation of an ignition device by installing a control means turning on the power source input part of an ignition circuit when stored data and newly input data are compared and agree an operation means carrying out the on/off operation of the ignition circuit from the outside.

CONSTITUTION: Ignition operation starts on pressing down a '*' mark key 3 in a key group 5. When a ten key 2 is pressed and the code data of this key 2 coincides with the data stored already in a RAM 13, a power source switch 17 of an ignition circuit 6 is turned on and a counter 15 is on. When an ignition key 7 is pressed within the set time of the counter 15, switches 6a, 6b are on and the counter 15 is on and the drive part 18 of a buzzer informing the starting of ignition operation is operated. By pressing the key 7 the operation of a gas ejecting nozzle 8 carried out through an operation lever 12 is performed and fuel gas is ejected from the nozzle 8. The ignition to the fuel gas is carried out by the spark discharge generated between the nozzle 8 and a discharge electrode 19.