[Purpose] To provide a headrest which avoids separation of a foam padding adjacent to a headrest stay passage hole from a headrest stay. [Means for Achieving the Purpose] A patch element 20 of a doughnut-like disc shape is fixedly provided, by sewing or adhesive, to a reverse surface of a seat-back-side area 12a defined in a trim cover assembly section covering a top region 12 of a headrest HR, in such a fashion that the patch element 20 circumscribes an entire edge of a headrest stay passage hole 14. Additionally, the patch element 20 is formed from a material capable of being impregnated with a liquid foaming agent (e.g. urethane of foaming property) injected in the trim cover assembly 2. Such patch element 20 has been impregnated with the liquid foaming agent S (e.g. urethane of foaming property) injected in the trim cover assembly 2 during a foaming process to form the headrest HR. Consequently, a density of the patch element 20 itself becomes extremely high, and therefore a strength of the patch element 20 can be increased to a great degree. Further, so impregnated patch element 20 achieves its firm integral connection with a foam padding 3 that are formed from the liquid foaming agent S, thereby preventing dislocation and removal of the patch element within a main body portion 10 of the headrest.