Objective : To determine whether the use an Frova intubating introducer could facilitate the insertion of a double lumen tube (DLT). Method : Twenty ASA physical status I or II patients scheduled for elective intrathoracic surgery under DLT general anesthesia were randomly allocated to receive double lumen endotracheal intubation either with (a study group) or without (a control group) an Frova intubationg introducer. Result : The mean times for the successful DLT intubation were 13.2 and 10.8 seconds in the control group and the study group, respectively (P = 0.35). There were no difference in number of attempts, laryngoscopic views (grade I or II), complications between the two groups. The proportion of satisfactory grading excellent or good was higher in the study group (9/10) than in the control group (3/10). Conclusion : From a small set of this preliminary study, we failed to demonstrate the improvement of DLT intubation by the use of Frova intubation introducer in patients with low grade of laryngoscopic views (grade I or II). A further larger study may be needed to demonstrate the clinical advantages of the introducer aided DLT intubation, particularly in patients with higher difficult grades of the laryngoscopic view (grade III or IV).