목적: By many kinds of surgerys or idiopathic reasons, vocal fold paralysis can occurs. But, there are not many studies about factors which can predict vocal fold movement. Some studies tried to show vocal fold movement restoration by laryngeal EMG, but these studies have some limitation of positive predictive value. This study evaluated about false vocal fold movement and tried to find the relationship of true vocal fold movement restoration in unilateral vocal fold paralysis patient 방법:The study was planned as retrospective cohort study by retrospective chart and stroboscopy review. 73 patients with unilateral vocal fold paralysis patients were enrolled. False vocal fold movement was examed by FCI ratio (Long diameter anterior commisure to vocal process, Short diameter right angle from center of long diameter to False vocal fold) which was exammed in patients stroboscopy. As another representation, false vocal fold movement was descripted in four catalogue (full, partial, twitching, none), and vocal fold movement also descripted in four catalogue (mobile, hypomobile, twitching, immobile). 결과:17 patients vocal fold movement were recovered, and 56 patients vocal fold movement were not recovered. In the recovered group, The FCI-difference showed decreasing pattern. Non recovered group showed no pattern of FCI-difference value, and in both group there was no correlation between vocal fold restoration and L-EMG in our data. False vocal fold contracture was appeared 2.52(2.92) mon earlier than vocal fold movement recovery in 17 recovered patients. 결론:False vocal fold contracture was shown earlier than restoration of true vocal fold movement. It could be the predictive factor in unilateral vocal fold paralysis patients.