A heating instrument equipped with a sheet (10) having a projection (12) which is convex on one surface (10a) side thereof, and a heat-generating material (30) positioned on the other surface (10b) side of the sheet (10), wherein: the sheet (10) is configured so as to contain a nonwoven fabric sheet (15)； the nonwoven fabric sheet (15) has at least two endothermic peaks associated with each of the phase transitions thereof； and the first endothermic peak among the peaks is in the temperature range of 60-180 DEG C, inclusive, while the second endothermic peak is higher than is the first endothermic peak.溫熱器具具備：片材(10)，其具有向一面(10a)側凸起之突起部(12)；及發熱材(30)，其配置於片材(10)之另一面(10b)側；且片材(10)包含不織布片材(15)而構成，不織布片材(15)具有至少2個分別伴隨有相轉移之吸熱波峰，其中第1吸熱波峰存在於60℃以上且180℃以下之溫度範圍內，第2吸熱波峰存在於較第1吸熱波峰更靠高溫側。
