Abstract: The invention relates to a device for suspending a helicopter tank, the tank comprising a container which possesses a top wall, a bottom wall, and side walls forming a closed volume which is designed to be placed in a compartment of the helicopter, the compartment having at least one partition adjacent to the top portion of the container. The device comprises at least one fastening made of a material that absorbs energy by plastic deformation, which fastening is fixed firstly to the partition of the compartment and secondly to one of said walls of the container so that in the event of a violent shock it limits the displacement and the acceleration of the container relative to the partition of the compartment by plastic deformation of the fastening.