To provide a fire extinguisher, which can be easily disassembled by easily disassembling a valve case from a container by unfastening a pored stop screw which can not be turned by a screwdriver acquirable for a general user, with a screwdriver installed on the side of a maker by fixing the valve case on the container by means of the pored stop screw.

After a valve case 2 is screwed and mounted on a container 1, a pored stop screw 3 is fastened from the side face of the valve case 2 and the valve case 2 is fixed on the container 1. At the same time, the pore of the pored stop screw 3 has a special shape of a Y-shaped base and this pored stop screw 3 can not be turned by the screwdrivers acquirable for the general users.