PURPOSE: To absorb shock to a great extent at the time of a flying body colliding against the ground or water surface so as to have large effect on life saving in an airplane accident by providing an air bag, expanded by the instantaneous lead-in of compressed air at the time of a crash, at the body space part of the flying body.

CONSTITUTION: A flying body 1 is provided, at its body space part, with an air bag storage chamber 3 provided with a double-swing closable hatch 2 almost from the tip of the airframe toward the rear part of the airframe, and a compressed air cylinder storage chamber 4 is provided along both sides of this chamber 3. An air bag 5, formed of high-strength flexible material, with its interior divided into plural chambers by partition walls is accommodated in the folded state inside the air bag storage chamber 3, and air lead-in ports chamber by chamber are communicated with the compressed air blowout hole 7 of a compressed air cylinder 6. In the case there is a fear of an airplane being crashed or making a forced landing, the closable hatch 2 is opened, and the compressed air blowout hole 7 of the compressed air cylinder 6 is opened interlockingly so as to supply compressed air into the air bag 5. The air bag 5 is thereby expanded instantaneously to form an air cushion at the body space outer face of the airplane.