The invention relates to a wiper device, comprising a nozzle unit (10a-10c), which is provided for arrangement on a wiper arm (12a; 12c) and for applying washing water on a vehicle window (14a-14c). It is proposed that the nozzle unit (10a-10c) is designed to apply in one operating state washing water on both sides of a wiper blade (16a-16c) fixed to the wiper arm (12a-12c) on the vehicle window (14a-14c).