Hanging system for a stretch false ceiling, permitting the passage of air

A hanging system for a stretch false ceiling, the hanging system comprising:

• a fastening profile suitable for being fastened to a wall of a building, the fastening profile having a wall including at least one air-flow opening;
• a rail arranged for hanging at least one stretched piece of fabric and configured to be securely mounted on the fastening profile;
• and
• a blocking device configured to hold the rail in position on the fastening profile when the rail is mounted on the fastening profile,
• wherein the fastening profile and the rail respectively have, protruding from a wall, reciprocal mating features making it possible to assemble the rail and the fastening profile by insertion of the reciprocal mating means into each other, and
• wherein the blocking device has at least one element forming a bolster disposed between the fastening profile and the rail.