CLEANING DEVICE

PURPOSE:To clean a step section uniformly and stably by setting a brush obliquely in the forwarding direction of a matter to be cleaned and adjusting the setting angle in accordance with the step of the matter to be cleaned in a cleaning device for cleaning the matter with step. CONSTITUTION:In a cleaning device for cleaning a matter 3 to be cleaned such as a liquid crystal panel with step 4 on its surface by means of a brush 1, the brush 1 is installed obliquely (angle theta) in the forwarding direction of the matter 3 to be cleaned. The brush 1 is moved to the center of the step 4 by the amount theta1 from the position (a) of hairs 3 of brush 1, in the case the brush is installed square in the forwarding direction of the matter 3 to be cleaned by the arrangement, and the bottom of the step 4 can be cleaned in a wider range. In the process that the matter 3 to be cleaned moves by the distance S, the hairs of brush are moved to the position C along the step 4 to carry out the cleaning of the step section 4 on the side of being farther to the forwarding direction of the matter 3 to be cleaned by a corner A of the step. The inclination angle of the brush 1 can be adjusted freely in accordance with the level of the step.