To inexpensively install a security air booth capable of completely preventing scattering from an asbestos powder dust removal work place.

In this security air booth, the periphery of a security room 3 in which a joint of separation sheets intercepting the inside from the outside of an air booth B1 is welded to form a closed space inside is supported by a framework body 1 through a support means 5. The interior is longitudinally partitioned into a plurality of rooms by a plurality of partition parts, and an entrance, exit and each partition part 11, which are optionally provided, are provided with a curtain part 7 which may allow a worker to pass through and allow the air to pass only in the direction pointing toward the entrance and exist of the work place. In assembling, the air booth is filled with air by an air valve 9 and inflated to be supported by the framework body, and in knock-down, the air booth is evacuated by a HEPA vacuum cleaner to be contracted. There is no risk that asbestos powder dust adheres to the framework body, and packaging can be achieved without cutting separation sheets, so that scattering of powder dust is not caused.