To obtain a fire extinguishing system unnecessitating a safety device by applying only the same pressure as that discharged at the time of normally extinguishing fire to a stop valve and a primary piping even though a fire extinguisher is erroneously discharged from an extinguisher storing container so as to control the pressure-resistant grade to withstand discharge at the time of normally extinguishing fire.

In a state where an extinguisher outputted from extinguisher storing containers 1 to a primary pipe 4 is decompressed, a plurality of extinguishing object sections 6 are respectively arranged via a plurality of stop valves 8 arranged in the pipe 4 in parallel and each stop valve 8 is always open to make the system always in an open state.