Abstract: A support device for a fire extinguisher of the type comprising a rigid hook on which the fire extinguisher is hung. The device is provided with a spring-operated, safety latch which prevents access to the hook by closing a groove in the hook as soon as the fire extinguisher is removed to prevent the fire extinguisher from being hung after having been used. A key is provided to allow only a few authorized persons to rehang or, if necessary, replace the removed extinguisher. This device controls the utilization and the condition of the fire extinguisher in a much more efficient and, accordingly, safer manner. If desired, the device can also be provided with a micro-switch connected to a control circuit to immediately advise those in charge of building safety as soon as a fire extinguisher has been removed from its hook.