To provide a car washing machine appealing the situation when tire washing or vehicle body lower part washing is carried out, and preventing the loss of a user when the tire washing or the vehicle body lower part washing is not carried out.

The car washing machine includes a car washing machine body 1 equipped with a plurality of car washing processing devices, a guiding display 22 positioned behind the car washing machine body 1 at a stand-by position and displaying information related to car washing by characters and figures, and a car washing control board switching the display contents of the guiding display 22 according to a car washing state or an accepting state by the car washing machine body 1. The car washing control board displays a state acting on a vehicle body according to the movement of the car washing processing devices by images, and when the car washing machine 1 does not normally act on the vehicle body, displays and reports that to the user.