Background: Primary spontaneous pneumothoraces (PSP) affect patients who do not have clinically apparent lung disorders.  Secondary pneumothoraces occur in the setting of underlying pulmonary disease.  Methods: A total of 100 patients, including both males and females, admitted during the given period to the hospital with a diagnosis of spontaneous Pneumothorax (SP) were included in the study after applying to the inclusion and exclusion criteria. Results: COPD was the most common cause (45.6%) followed by Tuberculosis (30%). Silicosis was seen in 18.9% of SSP cases. Other less common causes were Bronchiectasis (3.3%), Pneumonia (1.1%) and Malignancy (1.1%). Conclusion:  Secondary spontaneous pneumothorax is far more common than primary spontaneous pneumothoraces and COPD is the predominant underlying cause of secondary spontaneous pneumothorax followed by pulmonary tuberculosis. We also found that silicosis is a significant contributor to secondary spontaneous pneumothorax, after COPD and pulmonary tuberculosis. Keywords: COPD, TB, Etiology