Order to reduce as much as possible the occurrence of equipment abnormalities, such as gas leakage caused by the mounting lack of water humidifier by the user, L-shaped having an elastic member for supporting the humidifier to the mounting direction of the water humidifier of oxygen concentrator The detected indirectly by movement of the support member position change to the connection place of the water humidifier pressed against the mounting direction of water humidifier by a support member and close the opening and closing cover, caused by compression of the elastic member providing an oxygen concentrator characterized in that it comprises a sensor to, a fixing means for fixing in place a water humidifier.使用者による水加湿器の取り付け不備によって生じる気体漏れなどの機器異常の発生を極力低下させるため、酸素濃縮装置の水加湿器の装着方向に対して加湿器を支持する弾性部材を有するL字状の支持部材を備え、開閉カバーを閉めることで水加湿器を装着方向に押圧し、該弾性部材の圧縮により生じる水加湿器の接続定位置への位置変更を支持部材の移動により間接的に検知するセンサ、該水加湿器を定位置で固定する固定手段を備えることを特徴とする酸素濃縮装置を提供する。
