The purpose of the present invention is to provide a fire extinguisher that is inexpensive to produce, simple to handle, and capable of supplying fire-extinguishing sand to a storage tank during a fire-extinguishing operation. This fire extinguisher comprises a sand container (3) for housing the fire-extinguishing sand, a nitrogen gas cylinder (4), and an ejector (5) for receiving a supply of nitrogen gas discharged from the nitrogen gas cylinder (4) via a pressure reduction valve (6). The following are connected: an intake tube (7) for taking in the fire-extinguishing sand from inside the sand container using the negative pressure generated in the ejector (5) by the flow of nitrogen gas; and a transport tube (8) for transporting the intaken fire-extinguishing sand along with the nitrogen gas. The lid of the sand container (3) has an openable/closable sand-input port formed therein, and it is possible to supply the sand thereinto during a fire-extinguishing operation.