addition to the natural diseases process, iatrogenic airway complications also contribute to discomfort and decreased post-operative quality of life (5, 6). Not considering tonsillectomy in the childhood could also contribute to impaired growth (7). Though tonsillectomy is considered a painful procedure, especially in adults, the post-Abstract Introduction: One of the most common treatments for chronic and recurrent tonsillitis is a tonsillectomy. It must considered patient satisfaction and quality of life before and after tonsillectomy are two key factors in evaluation of successful surgery. The aim of this study was to investigate the effect of adenotonsillectomy on quality of life for adults over 14 years. Materials and methods: 40 adults with more than 14 years old were studied with chronic or recurrent tonsillitis in a cross-sectional study. The standardized questionnaire was used to assess the quality of life before and after surgery (GBI and GHSI). Questionnaires were completed before surgery and during the postoperative follow-up for each patient. Results: Total score of quality assessment questionnaire, public health subscale and social health subscale were significantly different before and after surgery. Quality of life after surgery has increased considerably. There was no significant difference in physical activity before and after surgery. Conclusions: Tonsillectomy in adults with recurrent and chronic tonsillitis can effectively improve the quality of life of patients.