To provide a braking auxiliary device for positively shortening a braking distance of an automobile safely without generating any frictional heat and for reducing wears of a brake system and a tire under a form for utilizing wind pressure in consideration of a safe driving of the automobile, environmental preservation, nature preservation and resource preservation.

A device for receiving wind pressure applied from a front side during driving of an automobile is installed at an effective location inside the automobile and a braking distance is reduced safely under utilization of the wind pressure.