Provided is an endoscope system capable of accurately controlling a heating unit even when temperature characteristics of a temperature sensor change. The endoscope system 1 includes an endoscope 2 having an insertion portion into which a distal end portion 6a is inserted into a subject, a heating portion 13 that is provided at the distal end portion 6a and heats a predetermined member disposed on the distal end portion 6a. A plurality of first temperature detection units 11 and second temperature detection units 12 that are provided in the peripheral region of the predetermined member in the front end portion 6a and detect the temperature of the front end portion 6a, and a power supply unit 200 that supplies power to the heating unit 13 The determination unit 203a that uses any one of a plurality of temperatures detected by each of the first temperature detection unit 11 and the second temperature detection unit 12 and a predetermined threshold value, and the determination result of the determination unit 203a And a power control unit 203b that controls the power supplied from the power source unit 200 to the heating unit 13.温度センサの温度特性が変化した場合であっても、加熱部を精度よく制御することができる内視鏡システムを提供する。内視鏡システム１は、先端部６ａが被検体に挿入される挿入部を有する内視鏡２と、先端部６ａに設けられ、先端部６ａに配置された所定部材を加熱する加熱部１３と、先端部６ａにおける所定部材の周辺領域に複数設けられ、先端部６ａの温度を検出する第１温度検出部１１および第２温度検出部１２と、加熱部１３に電力を供給する電源部２００と、第１温度検出部１１および第２温度検出部１２の各々が検出した複数の温度のいずれか１つの温度と所定の閾値とを用いて判定する判定部２０３ａと、判定部２０３ａの判定結果に基づいて、電源部２００が加熱部１３に対して供給する前記電力を制御する電力制御部２０３ｂと、を備える。
