PROBLEM TO BE SOLVED: To provide a better heating tool which can exhibit a required aromatic property during use even after long storage.SOLUTION: A heating tool contains an oxidization promoter having the capability of adsorbing 500 mg/g or less of iodine, a heating composition containing an oxidizable metal powder and water, and a perfume, and has at least the heating composition is stored in a gas-permeable storage bag.【課題】長期間保存した後であっても使用時には所望の芳香性が発揮できる、より優れた発熱具を提供する。【解決手段】よう素吸着性能500mg/g以下の酸化促進剤、被酸化性金属粉及び水を含有する発熱性組成物ならびに香料を含有し、少なくとも前記発熱性組成物が通気性を有する収容袋に収容されてなる発熱具。【選択図】なし