PURPOSE: To carry out the washing process in optional order by providing a spray washing mechanism to the opening part having a shutter and a vibration adding mechanism between the opening part and the spray washing mechanism.

CONSTITUTION: A thing 2 to be washed is hoisted by a cylinder, etc., and transferred to a transfer chamber 6. Then, the shutter 402 is opened and the thing 2 to be washed is horizontally moved to be entered into a waiting chamber 5 after the shutter 402 is closed. As soon as the thing is set on a transfer carrier 34, a shutter 401 is opened and the thing is stopped just under the spray washing mechanism 16. Then, washing liquid 14 is supplied from a tank 21 with a flap 19 closed to wash the thing 2 to be washed. Then, by changing over a solenoid valve 23, the washing liquid 14 from a tank 22 is supplied to the spray washing mechanism 16 to carry out spray washing. By this method, the consumption of washing liquid is reduced.