PURPOSE: To decrease the center of gravity of vehicle body without interference between the cylinder part and the mounting part by arranging an engine through largely inclining the cylinder part ahead, arranging the mounting part of steering ski on both sides of the cylinder part.

CONSTITUTION: In a small snow-mobile 1, a steering ski 3 is arranged at the front lower part of a vehicle body 2, and a track belt 4a at the rear part. The belt 4a is laid between a drive wheel 4b and a driven wheel 4c, and the drive wheel 4b is connected to a drive system 6 mainly composed of an engine 7 arranged at the front upper part. With this constitution, the engine 7 is arranged while the cylinder part 7a is inclined largely ahead. The mounting part of steering ski 3 (not shown in Fig.) is arranged at the opposed sides of the cylinder part 7a. It is thus possible to lower the center of gravity of the body 2 as well as that of the engine 7 and prevent interference with the cylinder part 7a.