PROBLEM TO BE SOLVED: To provide a thermometer having a simple structure and capable of simply estimating the temperature of a patient only by measuring skin temperature of the patient and outside air temperature.SOLUTION: A thermometer 1 includes a first temperature sensor for detecting skin temperature of a user, a second temperature sensor 5 for detecting outside air temperature being environmental temperature at which the user lives, and a control part for estimating the temperature of the user on the basis of the skin temperature detected by the first temperature sensor and the outside air temperature detected by the second temperature sensor, and a prescribed relation expression of preliminarily calculated body temperature, skin temperature and outside air temperature.【課題】構造が簡単であり、患者の皮膚温と外気温を測定するだけで簡便に当該患者の体温を推定することができる体温計を提供する。【解決手段】ユーザの皮膚温を検出する第１温度センサと、当該ユーザが居住する環境温度である外気温を検出する第２温度センサ５と、前記第１温度センサで検出した皮膚温及び前記第２温度センサで検出した外気温と、予め求めておいた体温、皮膚温及び外気温の所定の関係式とに基づいて、前記ユーザの体温を推定する制御部とを備えた体温計１。【選択図】図１
