PROBLEM TO BE SOLVED: To provide an exothermic implement which is hardly deviated from a mounting position and sufficiently shows a hyperthermic effect.SOLUTION: The exothermic implement includes: an exothermic part 1 enclosing in a section, an exothermic composition for generating heat by contact with air and an extendable belt shape part 3 for surrounding the whole or a part of the exothermic part 1 so as to keep a state where the exothermic part 1 has contact with a human body. The belt shape part 3 is connected to the end of the exothermic part 1. In the exothermic implement, a moisture permeability degree on a side having contact with the belt shape part 3 in the exothermic part 1, which is measured based on an A-method (moisture sensitive sensor method) to be regulated in JIS K7129, is 340-610g/m2.day, and also the air permeability of the belt shape part 3, which is measured based on "Paper and board-Determination of air permeance-Gurley method" of JIS P 8117-1998, is 3 seconds/300 cc to 61 seconds/300 cc.COPYRIGHT: (C)2011,JPO&INPIT【課題】装着位置からずれにくく、且つ、温熱効果を十分に発揮できる発熱具を提供する。【解決手段】空気と接触することにより発熱する発熱組成物が区画に封入された発熱部1と伸縮性帯状部3とを備えた発熱具であって、該帯状部3が、該発熱部1の全体又は一部を包囲して該発熱部1を身体に接触させた状態を維持させるものであり、該帯状部3は、該発熱部1の端部に連結されており、JIS K7129に規定されるA法(感湿センサー法)に準拠して測定された、該発熱部1の該帯状部3と接触させる側の透湿度が340~610g/m2・dayであり、JIS P 8117-1998「紙及び板紙-透気度試験方法-ガーレー試験機法」に準拠して測定された、該帯状部3の透気度が3秒/300cc~61秒/300ccである、発熱具。【選択図】図2
