A device for enhancing healing ability of living organism, which has an effect of healing a living organism by returning a tissue or organ of the body thereof, said tissue or organ being in an abnormal state, into the normal state without generating such a large difference in pressure as required for equalizing the pressure in the ears to the external pressure. The device for enhancing healing ability of living organism comprises a pressurizing means, a depressurizing means and a pressurization/depressurization controlling means, wherein a depressurization step for changing the atmosphere inside an airproof chamber, which can be airproofed, to a depressurized state and a pressurization step for changing the atmosphere from the depressurized state to the normal state are continuously and constantly repeated a preset number of times in a controlled manner by these means, and the minimum pressure in the depressurization step is equal to the pressure of the atmosphere at a height of 100 m or higher.
