PURPOSE: To provide a running vehicle in which a reduction in grounding force of a main wheel is prevented even at the time of cornering and at the time of running on a laterally inclined road to ensure driving force, and the self- standing property of a vehicle body is also improved.

CONSTITUTION: In a running vehicle in which one main wheel 13R of front and rear wheels 13F, 13R is suspended from a vehicle body 11 through a swing arm 15 in such a manner as to be vertically movable, and auxiliary wheels 18L, 18R are provided on lateral sides of the main wheel 13R, respectively. The auxiliary wheels 18L, 18R are supported to the vehicle body 11 by support arms 17L, 18R in such a manner as to be vertically movable, and the support arms 17L, 17R and the swing arm 15 are operably connected to each other through an interlocking means 20 in such a manner that the wheel 13R and the auxiliary wheels 18L, 18R are displaced in mutually opposite directions.