A heating tool (50) is provided with a mask main body (51) covering both eyes, a heating element (100) provided to the mask main body (51), and a pair of ear hooks (52L, 52R) that are joined respectively to both longitudinal ends of the mask main body (51) and hold the mask main body (51) so as to cover both eyes of the wearer, the heating tool (50) fulfilling the following conditions. (Conditions) (i) The ear hooks (52) have holes (54) for hooking over the ear, and the relationship (La * 2 + Lb) <； 285 is satisfied, where La (mm) is the maximum length of the hole (54), and Lb (mm) is the length from the end portion on the mask-main-body (51) side at La (mm) of one hole (54) to the end portion on the mask-main-body (51) side at La (mm) of the other hole (54)； (ii) the stress (N) when the mask main body (51) is extended 4 cm in the longitudinal direction is less than 70 N； and (iii) the change in stress in the La direction of the ear hooks (52), represented by formula (1), is 35% or higher. Formula (1): Change in stress (%) = {[stress at 100% extension (N)] - [stress at 10% return extension (N)]/stress at 100% extension (N)} <； 100.溫熱器具(50)具備覆蓋雙眼之遮罩本體部(51)、設置於遮罩本體部(51)之發熱體(100)、及分別接合於遮罩本體部(51)之長度方向兩端部且以藉由遮罩本體部(51)覆蓋佩戴者之雙眼之方式予以保持的一對掛耳部(52L、52R)，且滿足以下條件。(條件)(i)掛耳部(52)具有掛耳用之孔(54)，於將孔(54)之最大長度設為La(mm)，並將自一側孔(54)之La(mm)中之遮罩本體部(51)側之端部起至另一側孔(54)之La(mm)中之遮罩本體部(51)側之端部為止的長度設為Lb(mm)時，(La×2+Lb)＜285；(ii)使遮罩本體部(51)在長度方向上伸長4 cm時之應力(N)未達70 N；(iii)以下式(1)所表示之掛耳部(52)之該La方向之應力變化率為35%以上。應力變化率(%)={[100%伸長時應力(N)]-[恢復10%伸長時應力(N)]/100%伸長時應力(N)}×100 (1)
