There were 2 patients (1.6%) bleeding complication and injured laryngeal nerve after surgery. Conclusions: The rate of difficulty intubation in thyroid surgery is high, the predictive factors: interincisor gap < 4 cm, thyromental distance < 6 cm, Mallampati class III, Cormack - Lehane grade III, thoracic goiter was associated with tracheal deviation or compression on X ray > 1 cm.