In an anti-glare device for motor vehicles, a sun visor, which is arranged on the under-side of the front hollow transverse roof beam, can be displaced from a basic position, in which the sun visor is located approximately beneath the transverse roof beam, into an extended position, in which the sun visor projects into the region of the windscreen. In order to displace the sun visor a guide linkage is provided, which influences the sliding path of the sun visor and which is fastened within the cavity of the transverse roof beam. A drive means is further provided within the cavity of the transverse roof beam, which adjusts the sun visor by a corresponding control via the guide linkage or a displacing lever. By virtue of the described anti-glare device, an infinite and automatic adjustment of the sun visor is possible, by means of a switch fitted to the steering wheel, for example.