PURPOSE: To enable follow-up of a road surface by arranging an arm whose point end is drawn on almost a straight line.

CONSTITUTION: An automobile 83 is provided with partly a car body 84, wheel 85 and a structure of supporting this wheel. A center 86 of the wheel 85 is connected to an arm 87. One end of the arm 87, a supporting point 80 is connected to an arm D, and another one end of the arm D is connected to an arm E by a supporting point 79. Another one end of the arm E, a supporting point 81 is connected to the car boy 84, and an arm F is connected to the supporting point 79 by a supporting point 77. An upper arm is formed in the arm D, arm E connected by the supporting point 79, and it is connected to the supporting point 77 by an arm F. By mutual relation of these arms, an antiroll effect is provided.