PURPOSE: To enable to perform a hairdressing work at a desired place, by a method wherein hair washings stand, a feed water tank, which stores water fed to the hair washing stand, and a drain tank, which stores water used in the hair washing stand, are mounted to a self-runnable vehicle.

CONSTITUTION: A hair washing room 4 is installed between a driver's room 2 and a separate room 3 in a self-runnable vehicle 1. In the driver's room 2, an auxiliary feed water tank 6, a main feed water tank 10, and a pump 12, which pumps up water from the tank 10 and forcibly feeds the water to a gas water heater 16 in the separate room 3 and the 2 hair washing stands 18, are provided. A gas cylinder 20 is disposed to the side of the tank 10 in the hair washing room 4, and the gas water heater 16 is actuated by means of gas, fed from the cylinder, srving as fuel. Meanwhile, drain water, used in the hair washing stand 18, is caused to flow in a drain water tank 32 located under the floor of the vehicle 1. This, through movement of the vehicle 1 according to any demand, enables to perform a hairdressing work without selecting a place.