PURPOSE: To prevent spark plugs from being moistened, with the use of an ignition control device in a cold restrict area vehicle such as, for example, snow- mobile, on which a multi-cylinder and multi-carburettor type engine is installed, by enabling the ignition of all engine cylinders to be interrupted when either one of a plurality of carburettors is freezed.

CONSTITUTION: There are provided an ignition device 11 for energizing spark plugs 13, 13A in engine cylinders and a throttle switch 30 which is turned on only under such a condition that a throttle lever in a throttle control device (not shown) for simultaneously opening and closing carburettors relating to the engine cylinders is not returned. Further, a plurality of carburettor switches 20, 20A which are turned on only when the carburettors are at their idle opening degrees, are arranged in a series connection while they are connected in parallel to the throttle switch 20. Further when the throttle lever is returned so that the throttle switch is turned off, if either one of the carburettor switches 20, 20a is turned off due to a freezed carburettor, etc. the energization of the ignition device 11 is ceased.