The goal of this study is to compare the intubation condition when remifentanil or succinylcholine was used. In this randomized double blind clinical trial, 60 ASA Class I/II, and Mallampati grade of 1 or 2, with 18-70 years old patients and written informed consent, who were candidate for elective upper limb surgery will divided into two groups of 30 each. Patients with ASA class 3 or higher, Mallampati degree 3 or higher and obesity will be excluded. Basal heart rate, blood pressure and Sao2 will be controlled and noted. In group one remifentanyl 2 µg/kg, and propofol 2.5 mg/kg IV will be administered and group two fentanil 50 µg, propofol 2.5 mg/kg, then sucsynilcoline 1 mg/kg IV will be received. After 60 seconds preoxigenation all patients will be intubated. Heart rate and blood pressure will be assessed and recorded. Intubating conditions will be assessed according to the scoring system, including jaw relaxation, vocal cords position, and reaction to tube insertion or cuff inflation. The drugs will be prepared in covered syringes and will be injected blindly with an anesthesiologist who has performed the intubation. Another person who is blinded to the drug injection will control patients during intubation.