PURPOSE: To easily get out from a muddy place, by preventing racing of a tire on a snow road, a frozen road, a muddy road, or the like by utilizing sand.

CONSTITUTION: By operating the button of a switch from a driver's seat, a compressor 8 provided on the body of an automobile is operated to produce compressed air 7, a compressed air discharge pipe is provided on the upper part of a nozzle, a sand discharge pipe to discharge sand from a sand container is provided on the upper part of the nozzle, and by reduction of air pressure in the nozzle due to blow-out of compressed air through the nozzle, the sand is sucked. By injecting sand in the sand container 5 to the rugged pattern of the tread of a tire for an automobile through the sand discharge pipe 4 and the nozzle 2, friction resistance of the tire is increased due to sticking many sand particles and slip of the tire is prevented.