PROBLEM TO BE SOLVED: To provide a heating device capable of fixing a heat-generating part to a person's neck, shoulder, waist, etc. without using a cover or the like, and effectively applying heat to the middle trapezius muscle when used on the shoulder. provide. SOLUTION: A heating tool 1 includes a heat-generating material 2, a heat-generating portion 3 that accommodates the heat-generating material 2, and a pair of belts that do not accommodate the heat-generating material 2 and that protrude from left and right side edges 32A and 32B of the heat-generating portion 3. And part 4. The lower edge 31 of the heat generating portion 3 projects downward from the lower edges 41 of the pair of belt portions 4 in a convex shape. The lower edges 41 of the pair of belt portions 4 are smoothly connected to the lower edge 31 of the heat generating portion 3. [Selection diagram] Figure 1【課題】カバーなどを用いることなく発熱部分を人の首、肩、腰などに宛がって固定できるうえ、肩に使用した際に中部僧帽筋に温熱を効果的に与えられる温熱具を提供する。【解決手段】温熱具1は、発熱材料2と、発熱材料2を収容する発熱部3と、発熱材料2を収容せずかつ発熱部3の左右の側縁32A,32Bから突き出た一対のベルト部4とを備える。発熱部3の下縁31は、一対のベルト部4の下縁41よりも下側に向かって凸状に突き出ている。一対のベルト部4の下縁41は、発熱部3の下縁31と滑らかに繋がっている。【選択図】図1