The subject of the present invention is to provide a concentrated oxygen pressurization device and a concentrated oxygen pressurization method that supply concentrated oxygen to both the anesthesia device and the artificial respirator, and at the same time can obtain the normal operation of the artificial respirator.The solution of the present invention is a concentrated oxygen pressurizing device 10, which is used in the process of supplying concentrated oxygen to the artificial respirator 40, and is characterized by having: an oxygen concentrating section 12, which supplies concentrated oxygen； and a pressurizing section 18, which can The pressure of the concentrated oxygen supplied from the oxygen concentration unit 12 to the artificial respirator 40 becomes a predetermined pressure so that the concentrated oxygen is pressurized.本發明的課題為提供對麻醉器及人工呼吸器的兩方供給濃縮氧氣，且同時可得到人工呼吸器的正常動作之濃縮氧氣增壓裝置及濃縮氧氣增壓方法。本發明的解決手段為一種濃縮氧氣增壓裝置10，在將濃縮氧氣供給到人工呼吸器40的過程中使用，其特徵在於具有：氧氣濃縮部12，供給濃縮氧氣；增壓部18，以可自氧氣濃縮部12對人工呼吸器40供給的濃縮氧氣的壓力成為規定的壓力的方式使濃縮氧氣增壓。
