A head restraint assembly is provided for the rotationally secure arrangement of a head restraint on a vehicle scat formed from a backrest and a seat base part. The head restraint is arranged on the backrest by at least one head restraint rod such that the height thereof can be adjusted. A region is formed at an upper end of each head restraint rod. In the region the course of the head restraint rods defines a curve having a radius. The head restraint rods are arranged with the curved region in the head restraint in a form-fitting manner.