Wiper arm with at least one channel for a washing fluid

The wiper arm which has at least one inner cavity and at least one channel (12a) for a cleaning fluid, has a joint free realised degree of freedom (alpha ) for the creating of a bearing force. The inner cavity is formed by a tubular profile. The channel at least in one section is designed in one piece with a supporting component part. The wiper arm has a spring elastic sub-section (20a) in which the channel is protected by a flexible cover device. An independent claim is included for a device with a wiper arm and a drive shaft (18a), whereby the channel is continued through the drive shaft.