Abstract: Disclosed is a fire extinguisher (100) comprising a fire extinguisher cylinder (10) for a fire-extinguishing agent. The fire extinguisher cylinder (10) comprises a mouth portion as an opening, a shoulder, a cylindrical body portion, and a bottom portion and is shaped with use of a resin provided with no joint. In addition, the body portion in the fire extinguisher cylinder (10) has a thickness from 1 mm to 5 mm, and a crystallinity of the resin is from 13% to 30% at the sites other than the mouth portion and the bottom portion. Accordingly, the fire extinguisher (100) is lightweight and does not rust. Further, the fire extinguisher (100) has high strength or high pressure resistance.

Abstract: It is disclosed that a fire extinguishing method by gas, characterized in that, a fire extinguishing chemical of a gas type comprising at least one member selected from a group consisting of argon, nitrogen and carbon dioxide is discharged using foams, powder or water as a carrier so as to extinguish.

Abstract: A method of fire extinguishment with a gas, characterized by extinguishing a fire by ejecting at least one gaseous fire-extinguishing agent selected from the group consisting of argon, nitrogen, and carbon dioxide using a foam, powder, or water as a carrier.