PURPOSE: To provide a cleaning device capable of certainly removing wash water attached on a conveyor belt.

CONSTITUTION: Deposit of an article to be conveyed, etc., attached on a conveyor belt 1 is washed off by wash water jetted by a water spray nozzle 19 while the conveyer belt travels around on the side of a return track 1b, and wash water attached on the conveyor belt 1 is removed at the time when the conveyor belt passes pinch rollers 21, 23, 24, 25, 26. If a scraper 20 to be brought into press contact with at least on the conveying surface of the conveyor belt 1 is provided between the water spray nozzle 19 and the pinch rollers, removal efficiency of the attachment and the wash after attached on the conveyor belt 1 is remarkably improved.