Airway obstruction following endotracheal intubation may be fraught with danger. Foreign bodies often become lodged in the airway as a result of trauma or rupture of lung lession. Somtiems they are revealed at the time of respiratory obstruction. Injury to individual mass lession is not seen so often. We experienced two cases of airway obstruction due to dislodging of foreign bodies. By exchanging obstructed endotracheal tube or removal of extracted teeth with aid of bronchoscope, the patency of the airway could secured. The aim of this case report is to emphasize that the insertion of an endotrahceal tube does not completely guarantee the patency of the airway.