Abstract: Arrangement for fixing brush elements (9, 10) to a rotatable brush frame formed of shaft (3) and flanges fixed to it and in which assembly the direction of bristles (9) is fitted essentially in the direction of the radius of the rotatable brush unit. Brash elements (9, 10) are locked on shaft (3) by means of oblong elements, as tubes (1) in shaft (3) direction, which tubes are from their both ends fixed to flanges in order to remain in place by means of parts in the flanges, which parts are from the end of tubes (1) fitted to the inside of the tubes.