WORKING MACHINE

There is provided a working machine (1) in which a prime mover (4) can be prevented from stalling during a cold start. The working machine (1) includes: a machine body(2); the prime mover (4) that is mounted on the machine body (2); a fuel cylinder (130) that contains a fuel; a vaporizer (39) that vaporizes the fuel sent from the fuel cylinder (130) and supplies the fuel to the prime mover (4); a temperature detector (44) that detects a temperature correlating with a decrease in the temperature of the vaporizer (39); and a controller (47) that imposes restraint on the flow rate of the fuel flowing from the vaporizer (39) to the prime mover (4) when the temperature detected by the temperature detector (44) is lower than or equal to a first temperature.