PROBLEM TO BE SOLVED: To provide a treatment apparatus for sleep apnea syndrome which can be worn by a patient comfortably and continuously.SOLUTION: There is provided a treatment apparatus 1 for sleep apnea syndrome comprising: an oxygen supply unit 10 for supplying oxygen gas to a patient P; a first measurement unit 20 for measuring a concentration of nitrogen monoxide in expired gas of the patient P; and a helium supply unit 30 for supplying helium gas to the patient P when the nitrogen monoxide is detected by the first measurement unit 20.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】患者が快適にかつ継続的に装着できる睡眠時無呼吸症候群治療装置を提供する。【解決手段】患者Pに酸素ガスを供給する酸素供給部10と、患者Pの呼気中の一酸化窒素濃度を測定する第1の測定部20と、第1の測定部20で一酸化窒素が検出されるとき、患者Pにヘリウムガスを供給するヘリウム供給部30とを備える、睡眠時無呼吸症候群治療装置1。【選択図】図1