Fire extinguisher which comprises a container provided with a particulate extinguishing agent which can be dispersed on a seat of the fire. To easily disperse the particulate extinguishing agent, which comprises for instance montmorillonite, the container comprises a sidewall provided with a discharge opening for the particulate extinguishing agent, and the fire extinguisher comprises a handle connected via a telescopic tube to the container. In a protracted state the extinguishing agent can be dosed relatively safely. The discharge opening is preferably sealed until use using film such as metal tape.