Abstract: A windscreen wiper comprising a reciprocable arm, a flexible blade element mounted on the arm and including a pair of flexible wall members terminating in generally parallel spaced lip members adapted to engage a windscreen surface so that the blade element encloses therewith a hollow space, at least one conduit for cleaning liquid extending along the arm and communicating with the hollow space whereby cleaning liquids may be fed to the surface of the windscreen between the lips, and a flexible brush or assembly of brushes mounted in the said hollow space so as to bear on the surface of the windscreen between the lips and to be slidably engaged therewith during the wiping action.