An elevator system comprising at least one sheave , a plurality of hoisting belts , and a cleaning device for cleaning the plurality of hoisting belts and the at least one sheave , the at least one sheave including a plurality of grooves for receiving each of the hoisting belts , the cleaning device comprising: an attachment plate ; and a cleaning head including a base plate , characterised in that the attachment plate is fixed to a machine casing , the cleaning device further comprising: at least one L-shaped first bracket adjustably fixed to the attachment plate ; and at least one L-shaped second bracket adjustably fixed to the first bracket , wherein the cleaning head is fixed to the second bracket , the cleaning head further comprising a plurality of wipers fixed to an upper end of the base plate to project outwards from the base plate , wherein the cleaning head is positioned to clean the plurality of hoisting belts at once, wherein the cleaning device is installed such that the wipers project toward the inner surface of the hoisting belts to apply an adequate pressure thereon, or wherein the cleaning head is positioned to clean the plurality of grooves of the at least one sheave at once, wherein the cleaning device is installed such that the wipers project toward the traction sheave to apply an adequate pressure on the bottom of each groove of the traction sheave . an attachment plate ; and a cleaning head including a base plate , characterised in that the attachment plate is fixed to a machine casing , the cleaning device further comprising: at least one L-shaped first bracket adjustably fixed to the attachment plate ; and at least one L-shaped second bracket adjustably fixed to the first bracket , wherein the cleaning head is fixed to the second bracket , the cleaning head further comprising a plurality of wipers fixed to an upper end of the base plate to project outwards from the base plate , wherein the cleaning head is positioned to clean the plurality of hoisting belts at once, wherein the cleaning device is installed such that the wipers project toward the inner surface of the hoisting belts to apply an adequate pressure thereon, or wherein the cleaning head is positioned to clean the plurality of grooves of the at least one sheave at once, wherein the cleaning device is installed such that the wipers project toward the traction sheave to apply an adequate pressure on the bottom of each groove of the traction sheave . at least one L-shaped first bracket adjustably fixed to the attachment plate ; and at least one L-shaped second bracket adjustably fixed to the first bracket , wherein the cleaning head is fixed to the second bracket , the cleaning head further comprising a plurality of wipers fixed to an upper end of the base plate to project outwards from the base plate , wherein the cleaning head is positioned to clean the plurality of hoisting belts at once, wherein the cleaning device is installed such that the wipers project toward the inner surface of the hoisting belts to apply an adequate pressure thereon, or wherein the cleaning head is positioned to clean the plurality of grooves of the at least one sheave at once, wherein the cleaning device is installed such that the wipers project toward the traction sheave to apply an adequate pressure on the bottom of each groove of the traction sheave . <EOS>