PROBLEM TO BE SOLVED: To provide a hyperthermia tool capable of improving quality of one's sleep and improving vigor after awakening.SOLUTION: A hyperthermia tool 50 comprises heating bodies 100 comprising: a heating part 10 including an oxidized metal, a carbon component and water； a storage body 20 storing the heating part 10, and having air permeability on at least one surface, and satisfies following conditions: when temperature is measured in an environment in which, room temperature is 20°C and humidity is 50%, after start of heating of the heating bodies 100, after surface temperature (°C) of a hyperthermia tool 50 on the other surface side of the storage body 20 and on a position facing the heating region, reaches maximum temperature (°C), an average change ratio of the surface temperature until the surface temperature (°C) of the hyperthermia tool 50 reaches 45°C, is -1.0°C/minute or greater, and -0.5°C/minute or smaller.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】寝つきのよさを向上し、目覚めた後の活力を向上することができる温熱具を提供する。【解決手段】温熱具５０は、被酸化性金属、炭素成分及び水を含有する発熱部１０と、発熱部１０を収容し、少なくとも一方の面に通気性を有する収容体２０と、を含む発熱体１００を備え、以下の条件を満たす。条件：室温２０℃湿度５０％の環境下において温度を測定した際、発熱体１００の発熱開始後、収容体２０の他方の面側であって、発熱領域に対面する位置にある温熱具５０の表面温度（℃）が最高温度に到達した後、温熱具５０の表面温度（℃）が４５℃に到達するまでの当該表面温度の平均変化率が、－１．０℃／分以上、－０．５℃／分以下である。【選択図】図１
