PROBLEM TO BE SOLVED: To set the amplitude of the heat flux passing through a plurality of sets of a first temperature sensor and a second temperature sensor disposed sandwiching a heat insulating material to be different easily in a contact internal thermometer.SOLUTION: A contact internal thermometer 100 comprises: a measuring surface 20 for contacting with a surface to be measured of a measuring object to calculate an internal temperature of the measuring object； a temperature sensor laminate 31 in which a measuring surface side temperature sensor is disposed on the measurement surface side of a heat resistor and a rear surface side temperature sensor is disposed on the rear surface side； and a controller for calculating the internal temperature of the measuring object based on the measurement results of the measuring surface side temperature sensor and the rear surface side temperature sensor, wherein a shape of at least one surface of the surfaces exposed to the outside air of the rear surface side temperature sensor is a heat dissipation structure having ruggedness.【課題】接触式内部温度計において、断熱材を挟んで配置される第１の温度センサと第２の温度センサの複数の組とを通過する熱流束の大きさを簡便に異なるものとする。【解決手段】本発明に係る接触式内部温度計１００は、測定対象物の内部温度を算出するため前記測定対象物の被測定面に接触させる測定面２０と、熱抵抗体の測定面側に測定面側温度センサが配置され、背面側に背面側温度センサが配置される温度センサ積層体３１と、前記測定面側温度センサ及び前記背面側温度センサの測定結果に基づいて前記測定対象物の内部温度を算出するコントローラと、を有し、前記背面側温度センサの外気に露出する面の少なくとも一面の形状が、凹凸を有する放熱構造である接触式内部温度計。【選択図】図３
