A sun visor for vehicles is provided at one corner thereof with a mounting housing for connecting the sun visor to a sun visor shaft which is mounted to the vehicle. The mounting housing is embedded in the plastic foam material of the sun visor and is secured to a stiffening wire insert which extends therethrough. A first insertion opening is defined in the mounting housing for receiving the stiffening insert and a second insertion opening is provided for supporting a leaf spring and for receiving the sun visor shaft. The spring bears against the shaft to prevent unwanted rotation of the sun visor about the shaft.