The present invention relates to a cleaning device for an optical device cover, which, by placing a fluid nozzle below a curved part, can achieve a better Coanda effect without impacting the function of an optical device, and is characterized by comprising: a cover having a curved part; a housing in which an optical device is disposed inside of the cover; a fluid pipe installed on one side surface of the cover and supplying fluid; and a fluid nozzle for injecting the fluid into the cover.