DEEP BODY THERMOMETER

A deep body thermometer (1) includes a thermal resistor (113) having a predetermined thermal resistance value, a first temperature sensor (111) and a second temperature sensor (112) that are disposed to sandwich the thermal resistor (113) in a thickness direction of the thermal resistor (113), and a temperature information processing unit (50) (a deep body temperature acquisition unit (511)) configured to acquire a deep body temperature on the basis of the thermal resistance value of the thermal resistor (113), a temperature detected by the first temperature sensor (111), and a temperature detected by the second temperature sensor (112). The first temperature sensor (111) and the second temperature sensor (112) are disposed such that the first temperature sensor (111) and the second temperature sensor (112) do not overlap each other as viewed from the thickness direction of the thermal resistor (113) and a distance between the first temperature sensor (111) and the second temperature sensor (112) is longer than a thickness of the thermal resistor (113).