A heat treatment apparatus (1) for heating and treating a living tissue includes a first holding member (112) and a second holding member (114), and a first holding member provided on the first holding member. Heat generating element (116), second heat generating element (118) provided on the second holding member, and power for generating heat from the first heat generating element (116) and the second heat generating element (118) A power supply unit (220) for supplying power and a control unit (210) for controlling the operation of the power supply unit (220). The controller (210) includes a first mode in which the first heating element (116) and the second heating element (118) are set to the same temperature, and the first heating element (116) and the second heating element. The second mode in which the element (118) is set to a different temperature is switched during the treatment of the living tissue.生体組織を加熱して治療するための加熱治療装置（１）は、第１の把持部材（１１２）及び第２の把持部材（１１４）と、前記第１の把持部材に設けられた第１の発熱素子（１１６）と、前記第２の把持部材に設けられた第２の発熱素子（１１８）と、第１の発熱素子（１１６）及び第２の発熱素子（１１８）を発熱させるための電力を供給する電源部（２２０）と、電源部（２２０）の動作を制御する制御部（２１０）とを有する。制御部（２１０）は、第１の発熱素子（１１６）と第２の発熱素子（１１８）とを同一の温度にする第１のモードと、第１の発熱素子（１１６）と第２の発熱素子（１１８）とを異なる温度にする第２のモードとを、生体組織の治療の途中で切り替える。
