To Asses The Lung Function In Previously Treated Pulmonary Tuberculosis Lung Patients Materials and Methods: This Is A Hospital Based Study Of 115 Patients Attendinding The Tb And Chest Disease Opd. Chest Xray And Afb For Sputum Was Done In Post Tubecular Patients. Pulmonary Funtion Was Assessed In Sputum Negative By Spirometry. Results: Spiromery Results Showed 73.8% Patients With Obstruction, 19.7% With Restriction And 6.6% Patients Were Normal. Among Patients With Obstructive Disease, 20% Were With Moderate Obstruction, 46.7% With Severe Obstruction And 33.3 % Were With Very Severe Obstruction. Conclusion: Our Study Highlights That Even After Microbiologic Cure Of Pulmonary Tuberculosis, Patients Continue To Have Obstructive Airway Disease. So Thre Is Utmost Need To Decrease This Burden Through Various Maneuvers.