PROBLEM TO BE SOLVED: To provide a temperature measurement device capable of continuously measuring deep body temperature without putting a burden on a subject or a measurer.SOLUTION: A temperature measurement device includes: a temperature measurement unit 10 configured to be placed on a skin 6 of a subject and having a first temperature-sensitive element 21 covered with a first heat resistor 12, and a first coil 11； and a power supply unit 30 having a second coil 31 that supplies power to the temperature measurement unit 10 and a second temperature-sensitive element 32 covered with a second heat resistor 33. In the temperature measurement device, the temperature measurement unit 10 and the power supply unit 30 are detachable, and the power supply unit 30 is configured to be coupled with a body portion 40 provided with a power source 41. As a result, the temperature measurement unit 10 and the power supply unit 30 are coupled without having contact, so that deep body temperature of the subject can be calculated through temperatures measured at the first temperature-sensitive element 21 and the second temperature-sensitive element 32.
