WIPER BLADE FOR MOTOR VEHICLE WINDOW

A wiper blade comprises a support frame (2) for a wiping blade (4) capable of being in contact with the window to be wiped, the support frame having longitudinal grooves (16) disposed transversely on either side of the support frame for housing two stiffening elements (18). The support frame is covered by a casing element (6) engaged with the ends of the stiffening elements projecting beyond the support frame. The casing element comprises a cavity (8) which extends longitudinally in the volume of the mounting element to form a duct for the circulation of a liquid to be sprayed onto the window. The invention finds particular application in the cleaning of windows of motor vehicles.