To enable compact storage in a vehicle and sure installation on a guard rail even in the strong wind and utilize as a stretcher for putting on an injured person at the vehicular trouble generation time.

A device main body 1 formed in a ladder type stretcher 5 by a pair of air bags 2 for forming both side hollow columns for forming both side columns of a ladder type stretcher 5 formed to a ladder type stretcher shape by the expansion by a gas pressure and the air bag 3 for forming an intermediate hollow column constructed and communicated between mutual air bags 2 for forming both side hollow columns by plural steps is formed. A mark surface 4 is formed on one side of the device main body 1 and a holder 5A for ladder type stretcher is formed continuously in the air bag 2 for forming both side hollow columns and a attachable/detachable holding means 6 installed on the guard rail P while making the mark surface 4 sideways is provided to the holder 5A for ladder type stretcher. The holding means 6 is composed of a hook type arm 14 pivoted turnably to the installation cylinder part attachable/detachable to/from the holder 5A for ladder type stretcher. On the upper part between mutual air bags 2 for forming both side hollow columns in the ladder type stretcher 5, the air bag 7 for forming a hollow pillow provided with a recessed part for loading the head of the injured person is installed and communicated.