To provide a fire extinguisher capable of preventing a fire-extinguishing agent storage container made of resin and having an approximately hemispherical bottom from being overturned.

The fire extinguisher includes the fire-extinguishing agent storage container and a support base 50 for the fire-extinguishing agent storage container. The fire-extinguishing agent storage container is made of resin and has the approximately hemispherical bottom. The fire-extinguishing agent storage container also includes a receiving part 51 having a curved face 51a along the contour of the bottom, and a flat part 52 located under the receiving part 51 for supporting the receiving part 51.