PURPOSE: To uniformize the impact force of a cleaning liquid against a supporting face within a jetting area of the cleaning liquid while widening the jetting area of the cleaning liquid and to improve the cleaning effect of an object to be cleaned.

CONSTITUTION: A cleaning apparatus has a supporting face 5a to support an object to be cleaned and is provided with a moving body 5 which is made movable horizontally and nozzles 11, 26 to jet a cleaning liquid to the object to be cleaner, The nozzles 11, 26 are installed in a vertical shaft 9 which are set rectangularily to the supporting face 5a and made possible to square-rotate in the way the nozzles can move at least within the movement track of the object to be cleaned while keeping a constant distance from the supporting face 5a. While the jetting area of the cleaning liquid to the square rotation of the vertical shaft 9 is widened, the jetting impact of the cleaning liquid against the supporting face within the jetting area is made even and cleaning effect of the object to be cleaned is improved.