A snowmobile provided with skis and being steerable by a steering shaft, and being provided with a silencer on the front side of an engine. The steering shaft passes between the engine and the silencer and overlaps the silencer in side view. Flat step floors for a rider's feet are provided on lateral sides of a lower portion of a seat. Step bars for enabling positioning of the rider's feet are provided at front portions of the step floors. The step bars are each provided on the rear side relative to the step floor tip end and within 350 mm from a track belt drive shaft which is provided on the rear side of the engine. The resulting configuration of the snowmobile makes it possible to lay out the silencer close to the engine, affords excellent turning performance, and provides step floors for good foot holding properties.