Previous studies have established the efficacy of group and individual formats of cognitive-behavioral therapy in reducing fear of negative evaluation in social anxiety disorder, but the effectiveness of the group and individual therapies has not been widely assessed. This study was conducted to compare the effectiveness of cognitive-behavior group therapy to individual cognitive-behavioral therapy in social anxiety disorder. 28 patients were randomly allocated to two groups of 14. Each group participated in 12 weekly sessions. The final sample was 22 participants after drop-out. Pretest and posttest data were collected using the Brief Fear of Negative Evaluation Scale and the Beck Depression Inventory-II. Controlling for pretest fear of negative evaluation and depression, cognitive-behavioral group therapy was more effective than individual cognitive-behavioral therapy in reducing fear of negative evaluation, but the clinical significance and improvement rates of the two treatment formats were equivalent.