<;P>;PROBLEM TO BE SOLVED: To provide an ear insertion thermometer measuring accurately a body temperature. <;P>;SOLUTION: Each temperature at two or more different positions in an external auditory meatus is measured by a first temperature measuring part 36 and a second temperature measuring part 37 arranged in a bent part 34, and a temperature of an eardrum uninfluenced by an outside temperature is predicted by using each measured temperature, to thereby measure accurately the body temperature. <;P>;COPYRIGHT: (C)2011,JPO&INPIT