Abstract: A cleaning and coating apparatus for on-line cleaning of a moving surface, which comprises a cleaning unit, which is arranged for the mechanical cleaning of a moving surface, and a frame structure, to which said cleaning unit is attached and arranged to move back and forth over the moving surface. The apparatus also comprises a coating unit, which is arranged to apply the coating on a moving surface and to process it in a desired manner, for example, for attaching, in which case said coating unit is also coupled to said frame structure and arranged to move back and forth over a moving surface. The cleaning apparatus comprises a cleaning unit, which is arranged for the mechanical cleaning of a moving surface, and a frame structure, which the cleaning unit in question is attached to and arranged to move back and forth over the moving surface. In addition, the apparatus is arranged to automatically and according to the method replace the cleaning tool in use with a new cleaning tool.