<;P>;PROBLEM TO BE SOLVED: To provide a personal vehicle such as a wheelchair, which has traveling stability and projection traveling ability with a simple mechanism. <;P>;SOLUTION: The vehicle 1 includes: a vehicle body 11; a drive source 13 for a drive wheel 12; an operation part 14; a front wheel 15; a support member 16 provided with an auxiliary wheel 17 turnably attached to the vehicle body 11 in the side face view and energized in the direction of grounding on a road surface 90; and a posture adjusting element 18 for adjusting the posture of the vehicle body 11 by adjusting the turning angle of the support member 16 to the vehicle body 11. The posture adjusting element 18 is switchable to the free form of allowing the change of the turning angle of the support member 16 to the vehicle body 11 and the restraining form of suppressing the change of the turning angle of the support member 16 to the vehicle body 11. <;P>;COPYRIGHT: (C)2010,JPO&INPIT