A wiper device having a wiper blade adapter unit (10a-10i) which is provided for a releasable coupling of a wiper blade (12a-12i) to a wiper arm adapter unit (14a-14i) and which comprises at least one wiper blade adapter base member (16a-16i) which is able to be fixedly connected to the wiper blade (12a-12i). The wiper device comprises an adapter wind deflector unit (18a-18i) which is provided to deflect incident air and to press the wiper blade (12a-12i) against a vehicle windscreen (20a).