A cleaning system for cleaning a band circulating in a paper making machine ; the system comprising: - at least one detecting device configured to detect at least one parameter indicative of the cleaning conditions of the band on at least one portion of the band ; - at least one cleaning device provided with at least one nozzle to create a jet of a cleaning fluid; the nozzle being arranged so that the jet of cleaning fluid is directed towards the band ; - a control device configured to regulate the cleaning device on the basis of the at least one parameter indicative of the cleaning conditions of the band ; - a first moving assembly configured to move the detecting device along a direction (A) transversal to the circulation direction (S1) of the band ; the detecting device being active during the movement so as to detect a plurality of parameters indicative of the cleaning conditions of the band in different portions of the band ; - a second moving assembly configured to move the cleaning device along a direction (A) transversal to the circulation direction (S1) of the band ; the cleaning system being characterized in that the second moving assembly comprises: • a second moving device ; • a second carriage moved by the second moving device and coupled to the cleaning device ; • a second guide configured to guide the movement of the second carriage and extending along an axis (A) substantially transversal to the circulation direction (S1) of the band ; • a supporting frame supporting the second guide ; the supporting frame comprising two substantially identical uprights coupled to the second guide , resting on the floor or on an appropriate support base at the sides of the band ; wherein the second guide and the uprights define a bridge structure over the band . - at least one detecting device configured to detect at least one parameter indicative of the cleaning conditions of the band on at least one portion of the band ; - at least one cleaning device provided with at least one nozzle to create a jet of a cleaning fluid; the nozzle being arranged so that the jet of cleaning fluid is directed towards the band ; - a control device configured to regulate the cleaning device on the basis of the at least one parameter indicative of the cleaning conditions of the band ; - a first moving assembly configured to move the detecting device along a direction (A) transversal to the circulation direction (S1) of the band ; the detecting device being active during the movement so as to detect a plurality of parameters indicative of the cleaning conditions of the band in different portions of the band ; - a second moving assembly configured to move the cleaning device along a direction (A) transversal to the circulation direction (S1) of the band ; • a second moving device ; • a second carriage moved by the second moving device and coupled to the cleaning device ; • a second guide configured to guide the movement of the second carriage and extending along an axis (A) substantially transversal to the circulation direction (S1) of the band ; • a supporting frame supporting the second guide ; the supporting frame comprising two substantially identical uprights coupled to the second guide , resting on the floor or on an appropriate support base at the sides of the band ; wherein the second guide and the uprights define a bridge structure over the band . <EOS>