Trachobronchial aspiration of foreign bodies is one cause of fatal acciderts in children. Serious complications and death of these children is avoided by early diagnocsis and early removal of foreign bodies. The purpose of this report is to analyze the alteration of anesthetic method for removal of tracheobronchial foreign bodies in 54 children(62 anesthesia) experienced in St. Mary's hospital, Catholic Medical College, seoul, Korea, From Jan. 1, 1963 to Sep. 30, 1980. The removal of tracheobronchail foreign bodies for all cases was done under general anesthesia. Results were as follows: 1) Most tracheobronchial foreign bodies appeared in the 1~3 year old group (24 cases among 54 children). 2) The kinds of foreign bodies were foods and metals. Most were peanuts and beans, which were not visible on chest X-ray films. These foreign bodies can cause atelectasis and emphysema in 24 hours, which was evidenced by chest X-ray. 3) During bronchoscopy, the chest was compressed manually after mask ventilation. Recently 1005 oxygen was inhaled through a thin plastic catheter lodged side the bronchescope. intravenous ketamine with 100% oxygen through thin catheter allowed safe anesthesia for bronchoscopic procedure. 4) Anesthetic time required for bronchoscopic procedure was 31~60 minutes on the average. 5) Pulse rate was increased in 39 cases during bronchoscopic procedure.