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Introduction: Bronchiolitis has the major effect on patient's daily living. This study applied in order to the assessment of the quality of life in chemical warfare victims with bronchilitis obliterans. Methods: In this descriptive cross-sectional study, were selected 93 chemical warfare victims with bronchiolitis obliterans referred to respiratory clinic of Baqyatallah hospital by convenience sampling method for research. Quality of life was measured with St George’s Respiratory Questionnaire. Results: Mean of scores of symptoms, activity and impact domains and global scores was 85.56, 77.38, 68.5 and 74.25 ordinary. Quality of life was significantly correlated with percent of chemical injury and reverse correlation with FEV1. Persons with diploma and up education and employees have better quality of life. Conclusion: This findings show sever decrease of quality of life in this individuals. Lower quality of life related to decrease of FEV1 and affected to eye, skin and psychology disorders show global attention to promotion of the quality of life in chemical warfare victim with bronchilitis obliterans.