Abstract: This invention concerns a fastening system (6) for fastening an air blower, comprising a first part (60) to be fastened to a panel (4) and a second part (62) to be fastened to a frame (20) of an air blower, and an elastic decoupling element (64), formed by a helical spring, linking the first and second parts (60, 62), wherein the first and second parts (60, 62) are cup-shaped and have peripheral edges extending towards each other, the elastic decoupling element (64) comprises two terminal spires (640, 642) which are respectively inserted in the first and second cup-shaped parts (60, 62) and the fastening system (6) comprises plates inserted between the terminal spires (640, 642) and the central spires of the helical spring (64) and fastened to the first and second cup-shaped parts (60, 62).