PURPOSE: To provide a device for inflating a container or a floating body of a piece of lifesaving equipment capable of being operated by simple and small number of operating steps.

CONSTITUTION: The device 100 for inflating a container or a floating body of a piece of lifesaving equipment comprises a container neck 12 of the device 100 to be inflated in the container or the body with pressure gas from a pressure gas container 11 sealed by a diaphragm 14 and having an external thread 13 which can be screwed into a receiving aperture 15 in a housing 10. A gas content of the container 11 is released by opening the diaphragm 14 with an aid of an opening striker 24 disposed in the housing which may possibly be movable by means of a hand lever and a force of a spring against the diaphragm 14. The spring is tensioned simultaneously by screwing into the aperture 15 of the container 11 and retained with an aid of an automatic element 35 that is dissolved in water.