The best confirming method of the endatracheal intubation was that the endotracheal tube was seen between the vocal cords. The rapid confirming method of the endotracheal intubation was to displace the tracheal tube toward the palate, and to see the endotracheal tube between the vocal cords under laryngoseopy. The purpose of this study was to examine the accuracy of conect endotracheal tube placerment performed by an unexperienced resident of first grade used by rapid confirming method. Two hundreds and nine patients were randomly examined Samson & Young grade firstly and confirmed the rapid method. The results were as follows; 1) Samson & Young grade I (104 patients): 100% confirmed 2) Samson & Young grade II (68 patients): male-91.3%,female-97.8% confirmed 3)Samson & Young grade III (36 patients): male-94.7%, female-88.2% confirmed 4) Samson & Young grade IV (1 patients): 100% confirmed 5) The total rate of success was 97.1% (203/209). With the above results, the authors concluded that first grade resident could confirm queekly the most endotracheal intubation used by the rapid confirming method and even though in the patients of Samson & Young grade III or IV.