A wiper arm for motor vehicles having a driveable mounting arm (4) for connection to a motor vehicle, and a wiper bar (6) hinge-mounted on the mounting arm (4), which said wiper bar has a connecting hook (8) for attaching a wiper blade, whereby the connecting hook (8) has a first hook leg (19) having a thickness DA, and a second hook leg (21) opposite to the first hook leg (19) and interconnected with the first hook leg (19), which said second hook leg (21) has a thickness DE, whereby thickness DE is less than thickness DA.