The Implement of surgical operations is generally followed by inevitable related complications. Proper selection of patients for surgery, applying better techniques and above all, the post operative cares are among the points that should be taken into account to prevent surgical complications. Thorax ,regarding the elements and viscera in side it , such as heart ,lungs ,venae cavae (large veins), esopnagus, trachea..., is a & uitablesite which can be affected by injuries and damages, partially irreparable, if it is taken no notice of the above mentioned predisposing factors.One of the most routine procedures of thoracic surgeries is chest -tube drain insertion. Apart from functioning and specifications of this sort of drain, one of its most important complications is air leakage which may show itself in the forms of severe air leakage moderate air leakage and mild air leakage.Other complications that can be occurred during or after the chest -tube placement are: bleeding of intercostals arteries, subcutaneous emphysema, and lung’s parenchyma tearing and unilaleral pulmonary edema.Of course there are certain complications that are less common, including. Unwanted removal of the chest -tube, suture of the chest -tube to the chest wall, rupture of sub clavian artery and lung's parenchyma tearing which are discussed briefly in the full article.