Cognitive Behavioral Group Therapy (CBGT) is the most widely researched intervention program for social anxiety disorder (SAD, also known as social phobia), with a number of studies demonstrating its effectiveness. Another common treatment, social skills training (SST), has also been shown to be efficacious for SAD. The present study compared the standard CBGT intervention with a protocol in which SST was integrated into CBGT. Participants met diagnostic criteria for the generalized subtype of SAD, and most also met criteria for avoidant personality disorder and other comorbid Axis I disorders. The results revealed improvement in a variety of outcome measures for both treatments, but significantly greater gains for the CBGT plus SST condition. In fact, the effect sizes obtained for this treatment were among the largest found to date in any study of SAD. Clinical implications are discussed, and directions for future research are suggested.