Abstract: A conveyor belt scraper unit has two pairs of arms for connection to fixed supporting structures on either side of a conveyor belt. The two arms of each pair can be pivoted with respect to one another. One arm carries a reaction roller on one side of the belt and the other arm carries scraper blades. A spring urges the arms together so that the scraper blades scrape the belt in opposition to the roller. The various components of the unit are manufactured from corrosion-resistant materials, making the unit eminently suitable for use in corrosive atmospheres.