We experienced a case of unilasteral vocal cord paralysis following cuffed endotracheal intubation for abdominal surgery. The patient had have no laryngotracheal symptoms prior to the operation and anesthesia was uneventful. He complained of hoarseness post-operatively but no visible evidence of trauma secondary to the intubation was mainfested on the indirect laryngoscopic examination, except left vocal cord paralysis. There were no obvious causes for the vocal cord paralysis and possible etiologic factors. Therefore, no specific treatment was done except for the bed rest, humidification and gurgling. Vocal cord function returned nearly normal after six months.