PROBLEM TO BE SOLVED: To provide a heat generation device capable of easing a cool feeling when plastering it to a skin, effectively warming the skin, effectively supplying an oil content to the skin, easing the cool feeling after peeling it off from the skin, and, even after the use, having a high hyperthermic effect.SOLUTION: The heat generation device includes an adhesive layer 3. A specific heat of the adhesive layer is 3 J/g K under a temperature of 20°C. The adhesive layer includes a base, and the oil content having a specific heat of less than 3 J/g K under the temperature of 20°C, a boiling point of 100°C or more under 1 atmospheric pressure, and a content of the oil content of 30-90 wt.%.COPYRIGHT: (C)2014,JPO&INPIT【課題】皮膚への貼付時の冷感を緩和でき、皮膚を効果的に温められるとともに、油分が効果的に皮膚に供給され、また、皮膚からの剥離後の冷感が緩和され、使用後においても温熱効果が高い発熱具を提供する。【解決手段】粘着層3を備えた発熱具であって、粘着層の比熱が20℃において3J/g・K未満であり、該粘着層が基剤と、20℃における比熱が3J/g・K未満であり且つ1気圧における沸点が100℃以上である油分とを含有し、該粘着層中の該油分の含有量が30~90重量%である、発熱具。【選択図】図1