To provide a microwave therapy device of a condition virtually acting only to a specific cell without virtually acting to normal cells.SOLUTION: A microwave therapy device is provided with: a microwave generating part microwave generator 10; a microwave output part 20 outputting microwaves generated by the microwave generating part 10; and a microwave control part 30 which controls at least one of frequency, intensity, and an irradiation time of microwaves outputted by the microwave output part 20 under the condition that temperature of a treatment site is raised up to the temperature according to a therapeutic purpose of the patient by considering a distance between the microwave output part 20 and a patient.SELECTED DRAWING: Figure 1【課題】正常細胞には実質的に作用せずに特定細胞のみ実質的に作用する条件のマイクロ波治療器を提供する。【解決手段】マイクロ波発生部マイクロ波発生器10と、マイクロ波発生部10によって発生されたマイクロ波を出力するマイクロ波出力部20と、マイクロ波出力部20から出力されるマイクロ波の周波数・強度・照射時間の少なくともいずれかを、マイクロ波出力部20と患者との距離を考慮して、当該患者の治療目的に応じた温度まで治療部位を昇温する条件で制御するマイクロ波制御部30と、を備える。【選択図】図1