WIPER BLADE FOR MOTOR VEHICLE WINDSCREENS

A wiper blade (1) comprises a support frame (4) for a wiper blade (2) capable of being in contact with the window to be wiped, and a fastening portion (8) of the blade which serves for the connection of a blade connector which is arranged between the support frame and the blade. The support frame comprises at least two distinct cavities which extend longitudinally, said at least two cavities being distinct in that at least a first cavity (10) receives a stiffening element (22) and in that a second cavity (12) is adapted to allow the circulation of liquid between a liquid supply means and at least one liquid discharge hole (24) formed in a wall (16) of said second cavity. The invention finds particular application in the cleaning of windows of motor vehicles.