PURPOSE: To eliminate adsorption of wax to a glass surface by spraying anionic wax emulsion containing ultraviolet light absorbent to a vehicle after completely removing detergent component in the previous process, at the time of going stroke or coming stroke close to finish.

CONSTITUTION: A gate type car washing machine main body 1 is in reciprocatively running on rails 3, 3', and equipped with a pair of side brushes 4, 4', a top brush 5, a pair of rocker brushes 7, 7', plural number of liquid spraying nozzles and so on. It has a process of waxing to a specially dirtless ordinary vehicle, and a process of waxing together with use of detergent for deposit and treatment agent for a terribly dirty vehicle as car washing process. In this case, it is made to spray anionic wax emulsion containing ultraviolet light absorbent to a vehicle after completely removing detergent component in the last process, at the time of going stroke or coming stroke close to finish. It is possible thereby to eliminate adsorption of wax to a glass surface because of the fact that anionic wax emulsion is not acting on a place in which no paint film or no oil film exists, and to eliminate a fear badly influencing on visibility of a driver.