The results of a meta-analytic study on the effectiveness of psychological and pharmacological interventions with children and adolescents under social phobia are presented. Thirteen scientific reports were identified and led to 26 independent studies, 20 treatment groups and 6 control groups. Four hundred and thirty children with an average age of 14 and predominantly girls took part (66.6%). The treatment was highly effective (d+= 1,52) with an improvement continuing in the follow-up (d+= 1,68). The treatment package IAFS obtained the best results (d+= 1,90). Results were better when treatment sessions were distributed with group and individual interventions, carried out in educational centers by experienced psychologists, and with older and female children. Finally, results are discussed, and lines in future research proposed.