Smoking amongst women has become significant as the number of smoking women is increasing gradually in this developing society. It affects the lungs to produce Chronic Obstructive Pulmonary Disease (COPD). Present study was conducted over 100 smoker's women and 100 non-smoker women in the age group of 30-40 Years. Three Lung Function Tests – FEVI, FVC and PEFR were employed to all smoking and non-smoking women. It was observed that all the above mentioned three parameters of lung function tests were reduced significantly among smoker women as compared to non-smoker women. These reduce parameters of lung function test among heavy smokers are suggestive of chronic obstructive lung diseases