Abstract: In the field of devices for airdropping a load from a flying vehicle, there is provided a device for securing/releasing a first member (65) able to support a load of more than 20 kg, and a second member able to support this first member and the load, this second member including, on the one hand, a support (1) onto which are secured first elements including a sensor (26), for example of an altimeter or chronobarometric type, able to trigger, during the flight, the release of the first and second members upon exceeding a threshold or receiving an exterior signal, where the second member includes a hook (3) in two parts, one of which is movable (14) between an operative position and an inoperative position, and elements (7, 8, 25, 71, 76) for locking and unlocking the movable part of the hook in its operative position.