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Background: The fact that DM affects the microcirculation was recognized over a century ago but the concept that there might be a specific angiopathy underlying many of the late complications of diabetes was not known till the survey of Lundback. Objectives: This study was undertaken to find out the effects of type II DM on pulmonary functions and whether these effects have a correlation with the diabetic status of the patients as well as the presence of other microvascular complications. Methods: The present study was cross sectional, observation study. 70 patients were screened as per the protocol of the study. The obtained data was analyzed by chi square test and one way Analysis of variance (ANOVA) test and independent sample t-test. For all statistical comparisions, P value < 0.05 was considered statistically significant. Results: The mean age of the study population was 55.39±11.39 years. 40% were found to have more than one microvascular complications. Retinal complication was the most common (18.57%) neural was found in 8.57% and renal was the least common (7.14%). 51.4% had a normal PFT pattern. Of those having an abnormal PFT most (21.4%) were found to have a restrictive pattern. Out of the 36 patients who had normal PFT, 15 (41.67%) had no associated microvascular complication. there is significant association between the duration of diabetes and decline in pulmonary function parameters (p value=0.0299). Conclusion: Patients of Type II diabetes were prone to decline in lung function and restrictive pulmonary pattern. Decline in pulmonary function is more in the presence of other microvascular complications.