Abstract: Herein disclosed is a snowmobile stabilizer system which is constructed such that independent suspension systems attached to the right and left of a front portion of a snowmobile body for supporting steering skis, respectively, are equipped with air cushions, respectively, which have their air chambers communicating with an air reservoir through normally open adjusting valves. These normally open adjusting valves are controlled to associate with the steering operation of a steering handle such that the adjusting valve positioned at the side opposite to the steering direction is throttled.