PROBLEM TO BE SOLVED: To provide a lightweight thermal mask capable of bringing about a thermal effect for many hours.SOLUTION: The thermal mask includes a packaging component and a thermal storage material. The thermal storage material undergoes the phase transition between a solid phase and a liquid phase in the temperature range of not less than 38°C and not more than 48°C.COPYRIGHT: (C)2012,JPO&INPIT【課題】長時間にわたり温熱効果を得ることができて、かつ軽量の温熱マスクを提供すること。【解決手段】包装体及び蓄熱材を含む温熱マスクであって、前記蓄熱材は38℃以上48℃以下の温度領域で固相-液相間の相転移する材料である温熱マスク。【選択図】図1