Windscreen wiper with spray nozzle and the check valve

which is driven via a drive shaft and to which a wiper blade (20) is articulated wiper with a wiper arm (10), wherein at least one spray nozzle (64) on a pivotable part (10, 22) is disposed, which (via a water inlet 56 ), is connected to a water pump characterized in that in a housing (36) is taken in a nozzle body (40) having an inlet channel (42) and at least one outlet channel (44), said inlet channel (42) of one (to the water inlet 56 ) pointing end face (52) extends, and (on a circumferential surface 54) of the nozzle body (40) opens, while the outlet passage (44) (from the inlet channel at a distance 42) (from the outer surface 54) emanates and leading in a (to the spray nozzle 64) injection channel (46) opens out, and wherein a membrane (58, 70) in the pressureless state closes the inlet duct (42) and the outlet channel (44).