Studied the development and psychological correlates of social anxiety with peers in early adolescence, and whether there were age and gender differences. 508 French 4th–9th graders completed questionnaires assessing their perception of peer-related social anxiety, and the social cognitive dimensions of inward and outward self-consciousness and perceived peer acceptance. Results show that overall, there was a decreasing tendency with age for social anxiety and inward self-consciousness, although the participants increasingly perceived themselves to be neglected by their peers. Analyses suggested that inward self-consciousness, outward self-consciousness, and perceived peer acceptance contribute independently to social anxiety. The only sex difference in social anxiety was higher fear of negative evaluation among girls. Boys scored slightly higher than girls on perception of peers as liking them. These results may suggest which educational and clinical methods are most appropriate for helping adolescents who face high social anxiety.