To prevent creases from being generated or a fold from loosened by speedily cooling a collar after heating and pressing when pressing the collar of shirts.

A collar 6 of shirts is mounted while being wound around the outer periphery of a heating section 7 at a core member 5 axially having the heating section 7 and a non-heating section 8, a fastening belt is wound and fastened around the outside of the collar 6 mounted around the core member 5, the collar 6 is heated and pressed between the core member 5 and the fastening belt, next, the core member 5, the collar 6 and the fastening belt are moved relatively to the axial direction of the core member 5, the collar 6 and the fastening belt are positioned at the non-heating section of the core member 5, and the collar 6 is cooled and pressed between the core member 5 and the fastening belt.