A method for forming cushions including the following four steps: (1) a compression step in which the structure (2) is compressed in a mold (3); (2) a thermal softening step in which the structure (2) is thermally softened by means of a heating medium; (3) a curing step in which the structure (2) directly undergoes forced cooling in a cooling medium, and is then cured; and (4) a mold release step in which the structure (2) is released from the mold (3).