Introduction：Respiratory failures are categorized into types I and II. To our knowledge, we report the first case of pulmonary rehabilitation in a patient with systemic sclerosis/polymyositis overlap syndrome who developed type II respiratory failure.Methods：The patient was a 77-year-old woman who had received treatment for systemic sclerosis and polymyositis at another hospital. When she visited our hospital to obtain a second opinion, she suddenly lost consciousness and underwent trachea intubation because of typeⅡrespiratory failure. She received physical therapy on the third day of hospitalization and underwent a tracheotomy on the 16th day. As her thoracic movement was markedly restricted, we started physical training. After she was weaned off from the ventilator on the 43rd day, we performed muscular strength training and aerobic exercise. No exacerbation of CO2 storage was observed even if chest motion training was performed. She was discharged on the 72nd day and advised to wear retina®．Administration of therapeutic drugs such as steroids was maintained at the same dose.Conclusion：Physical therapy, such as chest mobilization, was effective for marked restriction of chest movement in a patient who had both polymyositis and systemic sclerosis.

Introduction：Respiratory failures are categorized into types I and II. To our knowledge, we report the first case of pulmonary rehabilitation in a patient with systemic sclerosis/polymyositis overlap syndrome who developed type II respiratory failure.Methods：The patient was a 77-year-old woman who had received treatment for systemic sclerosis and polymyositis at another hospital. When she visited our hospital to obtain a second opinion, she suddenly lost consciousness and underwent trachea intubation because of typeⅡrespiratory failure. She received physical therapy on the third day of hospitalization and underwent a tracheotomy on the 16th day. As her thoracic movement was markedly restricted, we started physical training. After she was weaned off from the ventilator on the 43rd day, we performed muscular strength training and aerobic exercise. No exacerbation of CO2 storage was observed even if chest motion training was performed. She was discharged on the 72nd day and advised to wear retina®．Administration of therapeutic drugs such as steroids was maintained at the same dose.Conclusion：Physical therapy, such as chest mobilization, was effective for marked restriction of chest movement in a patient who had both polymyositis and systemic sclerosis.