PROBLEM TO BE SOLVED: To provide a heating tool capable of following heat of a body and transmitting heat to the body without changing air permeability of an inner bag. SOLUTION: The heating tool 10 includes a body warmer 20 having an air-permeable inner bag 21 and a heat-generating composition 24 which is enclosed in the inner bag 21 and generates heat when contacting air, and a support 31. , A pressure-sensitive adhesive layer 32 provided on one surface of the support 31, and a sticking member 30 that is more elastic than the inner bag 21, and the body warmer 20 on the other surface of the support 31 of the sticking member 30. And mounting means for mounting. [Selection diagram] Figure 1【課題】内袋の通気性を変化させることなく、体の動きに追従して熱を体に伝えることが可能な発熱具を提供する。【解決手段】発熱具１０は、通気性を有する内袋２１と、内袋２１の内部に封入され空気と接触して発熱する発熱性組成物２４とを有するカイロ本体２０と、支持体３１と、支持体３１の一方の面に設けられた粘着剤層３２とを備え、内袋２１よりも伸縮性を有する貼付部材３０と、カイロ本体２０を貼付部材３０の支持体３１の他方の面に取付けるための取付手段とを備える。【選択図】図１
