A streamlined windscreen wiper comprises a longitudinal streamlined fairing comprising a central mounting and at least one end cap, at least one adapter element fixed to the central mounting and comprising a central web and two legs extending substantially perpendicularly from opposing edges of said central web, one of said at least one end caps being articulated to said adapter element, and a retention means comprising at least one rib extending from a lower surface of the central mounting and oriented substantially perpendicularly to the central web of the adapter element, and a window provided in the central web of the adapter element, the window being engaged by the at least one rib.

A lever is made of resin and constitutes a part of a wiper lever assembly that supports a blade rubber. The lever includes a coupling part having a coupling shaft to be coupled to a wiper arm. Further, the lever includes a pair of arm parts composed of a first arm part and a second arm part extending in mutually different directions from the coupling part. In addition, the lever includes a convex part protruding from the coupling part, formed at a center part between an end part of a first arm part opposite to the coupling part and an end part of a second arm part opposite to the coupling part.

The invention relates to a windscreen wiper blade for a motor vehicle. The wiper blade includes a fairing, with a central mounting, at least one end cap, and at least one adapter element attached to the central mounting. The adapter element includes a central core and two legs extending from opposite edges of the central core, one of the at least one end cap(s) being pivotally hinged to the adapter element. The adapter element having a narrowed portion in at least one of the two legs, located at the hinge between the end cap and the adapter element and extending from at least one hinge hole to the central core of the adapter element.