Abstract: A detachable windshield wiper assembly for a helmet having a front visor consists of a housing which has fastening means cooperable with means on the helmet for detachably securing the housing thereto. The housing has a rear wall, which has the fastening means, contoured to be brought into close engagement with the front wall of the helmet. The housing carries within same an electric motor, gearing drivably connected to the motor, and an oscillatable wiper blade-carrying arm which extends through an opening in the lower portion of the housing. The wiper blade-carrying arm is connected to a pivotable element which is driven by the motor and gearing through an arc determinative of the sweep of the wiper blade.