The invention relates to an avalanche triggering system comprising a frame (4) fitted with means of attachment (5) for transporting the system, especially by helicopter with the aid of a cable (3), the frame (4) comprising, at the top, a storage area (6) for at least one gas container (7) designed to form an explosive mixture and, at the bottom, a holding system (8) for holding a plurality of balloons (9), each having an inflation sleeve and each being separated from the others, means (7, 13, 14) for conveying the explosive mixture to the inflation sleeve of a balloon (9), an injection nozzle (12), and means for igniting the explosive mixture, the balloon holding system (8) being mounted movably on the frame (4) to bring the inflation sleeve of each balloon (9) in succession up to the injection nozzle (12) and to the ignition means.