A steam hot tool is provided with a covering member which has a covering section for covering both the mouth and the nose of a user and a water vapor generator which is held on a user-facing surface of the covering section, wherein a space is formed between the covering section and the face of the user upon use and the following formulae are satisfied: (1) 300 ≤ VG ≤ 1500； (2) 40 ≤ MV ≤ 150； and (3) 5 ≤ VG/MV ≤ 25 (in formulae (1) to (3), VG represents a cumulative generation amount [mg] of water vapor emitted to the space within 10 minutes after the start of the generation of water vapor by the water vapor generator； and MV represents a volume [mL] of the space).蒸氣溫熱器具具備：被覆構件，其具有覆蓋使用者之嘴巴與鼻子之被覆部；及水蒸氣產生體，其保持於上述被覆部之上述使用者側之面；於使用時形成夾於上述被覆部與上述使用者之臉之間之空間，且滿足下述式(1)～(3)。300≦VG≦1500 (1)40≦MV≦150 (2)5≦VG/MV≦25 (3)(式(1)～(3)中，VG表示上述水蒸氣產生體開始產生水蒸氣後10分鐘內釋放至上述空間內之累積水蒸氣產生量[mg]，MV表示上述空間之容積[mL])
