Flat wiper blade for use in windscreen wiper modules for vehicles, essentially consisting of: - a wiping rubber (8, 8a, 8b) in addition to two spring rails spaced apart from one another and receiving the wiping rubber (8, 8a, 8b) in a subsection (8.1) between them, each spring rail respectively project over the wiping rubber (8, 8a, 8b) on the longitudinal sides of the wiper blade; and - at least one jet or injection strip (39, 44) provided on at least one longitudinal side of the wiper blade, having at least one injection or washing duct with a large number of jet or injection openings for application of a washing and cleaning fluid to a vehicle windscreen and comprising clip-like fixtures to retain the one injection or washing duct on the external peripheries of the spring rails, wherein - the fixtures are formed of a U-shaped fastening section, extending over the entire or essentially the entire length of the respective injection or washing duct, the fixtures being manufactured in one piece with the one injection or washing duct, and wherein - the injection or washing duct is retained on the wiper blade (35, 35a-35e) in the area of a spring rail by several clips (41, 41a-41e) distributed in the longitudinal direction of the wiper blade, which span and secure the injection or washing duct on the wiper blade (35, 35a-35e) and wherein - the wiper blade is constructed in the manner of a spoiler on its upper side. characterized in that - the wiping rubber is designed on the upper side of the wiper blade with a spoiler-like profile section (8.2) or - the at least one spoiler profile is fastened to the upper side of the wiper blade, such as the at least one spoiler profile, for its fastening, spans the spring rails with fastening sections (47, 48) on external peripheries, the at least one jet or injection strip (39, 44) being retained by means of its fastening section (40, 45) on the spoiler profile or on a fastening section (47, 48) of the spoiler profile and spanning this fastening section (47, 48). - a wiping rubber (8, 8a, 8b) in addition to two spring rails spaced apart from one another and receiving the wiping rubber (8, 8a, 8b) in a subsection (8.1) between them, each spring rail respectively project over the wiping rubber (8, 8a, 8b) on the longitudinal sides of the wiper blade; and - at least one jet or injection strip (39, 44) provided on at least one longitudinal side of the wiper blade, having at least one injection or washing duct with a large number of jet or injection openings for application of a washing and cleaning fluid to a vehicle windscreen and comprising clip-like fixtures to retain the one injection or washing duct on the external peripheries of the spring rails, wherein - the fixtures are formed of a U-shaped fastening section, extending over the entire or essentially the entire length of the respective injection or washing duct, the fixtures being manufactured in one piece with the one injection or washing duct, and wherein - the injection or washing duct is retained on the wiper blade (35, 35a-35e) in the area of a spring rail by several clips (41, 41a-41e) distributed in the longitudinal direction of the wiper blade, which span and secure the injection or washing duct on the wiper blade (35, 35a-35e) and wherein - the wiper blade is constructed in the manner of a spoiler on its upper side. characterized in that - the wiping rubber is designed on the upper side of the wiper blade with a spoiler-like profile section (8.2) or - the at least one spoiler profile is fastened to the upper side of the wiper blade, such as the at least one spoiler profile, for its fastening, spans the spring rails with fastening sections (47, 48) on external peripheries, the at least one jet or injection strip (39, 44) being retained by means of its fastening section (40, 45) on the spoiler profile or on a fastening section (47, 48) of the spoiler profile and spanning this fastening section (47, 48).