Teeth loss becomes increasingly common in elderly population and the effective demand for prosthetic care increases, as the patients want to restore the oral health function, esthetics and mastication. Complete denture has a significant role in functioning of respiratory system as per the data. In this study we evaluated the effect of complete denture on the respiratory ability of the patient by calculating the spirometric values. Materials & Methods: Total of 50 patients were evaluated for the spirometric assessment, patients were not allowed to eat or do any physical activity 2 hours prior to the starting of study. The spirometry test was done in the presence of denture and in the absence of denture. The patients forced vital capacity was measured and was recorded in the excel sheet, after measuring the comparison was done between the values using SPSS software Results: A total of 50 patients were examined for the study, 27 were male patients and rest were female patients. Significant results were obtained after analyzing the data Conclusion: wearing of the denture does affect the respiratory function of the patient