The over-preventing to become a vacuum pump for reducing the pressure in the airtight portion inside in communication with the airtight possible airtight unit, the outlet of the airtight unit, an over-pressure reduction below a threshold pressure the pressure in the airtight portion is predetermined and a decompression prevention device, a pressure reducing step of changing to a reduced pressure state of the threshold pressure than the air pressure in the airtight parts within 1 to 60 minutes, and always from the decompression state 1 to 60 minutes, the pressure of the gas-tight possible airtight section The pressure reduction control means for controlling repeated continuously, and a pressurization step of changing the widely normal pressure state lower than the atmospheric pressure greater than the reduced pressure or pressure, and well stimulation to enhance the natural healing power of a living body It is possible to obtain human healing ability improvement device capable of providing.気密可能な気密部と、この気密部の排気口に連通して気密部内の気圧を減圧する減圧ポンプと、気密部の気圧が予め定められた閾値気圧を下回る過減圧となることを防止する過減圧防止装置とを備え、気密可能な気密部の気圧を、1~60分間で気密部内の気圧を前記閾値気圧以上の減圧状態へ変化させる減圧工程と、1~60分間でこの減圧状態から常圧か前記減圧状態よりも高く常圧よりも低い広範常圧状態へ変化させる与圧工程とを、連続的に繰り返し制御する減圧制御手段により、生体の自然な治癒力を向上させる刺激を良好に与えることができるヒト治癒能力向上装置を得ることができる。
