A headrest sleeve for assembly to a bracket fixed to a stay for supporting a main body of a headrest. The headrest sleeve includes a sleeve body formed in a tubular shape, a collar-shaped flange extending from one end portion of the sleeve body and disposed so as to be capable of contacting the bracket, a bracket-fitting section extending from the flange toward an opposite side from the sleeve body and configured to be capable of being fitted into a fitting hole formed in the lower bracket, and an anchor clip provided at the bracket-fitting section and configured to undergo elastic deformation and elastic recovery during the fitting of the bracket-fitting section into the fitting hole so as to engage with the bracket from an opposite side from the flange.