To allow a worker to conduct the car supporting work by effectively utilizing a shock absorber installed on a pit floor and its installation place.

This car stopper device is provided with a tubular spring fitting base 10 constituting a shock absorber together with a spring 4 and the first protruded tube 12 and the second protruded tube 14 stored in the shock absorber in use as the shock absorber. A top plate 14a fitted at the apex of a car support rod is lifted, the first protruded tube 12 and the second protruded tube 14 are connected by a connecting rod 16, the second protruded tube 14 and the spring fitting base 10 are connected by a connecting rod 18, and the car support rod is formed with the first protruded tube 12, the second protruded tube 14, and the spring fitting base 10.