Social anxiety in adolescents oftentimes goes undetected because of the internalized nature of the disorder as well as adolescents' reluctance to discuss their mental health. A reliable and valid self-report measure for assessing symptoms of social anxiety in adolescents for use in an educational setting is particularly important because of the burden that social anxiety can have in educational settings. This study aimed to test the previously proposed two-factor structure of the Social Anxiety Scale for Adolescents (SASA), Apprehension and Fear of Negative Evaluation and Tension and Inhibition in Social Contact, in an adolescent sample (n = 215; 12-18 years; 90 female) in Ireland using confirmatory factor analysis (CFA). CFA validated the two-factor structure of the SASA previously found in Slovenian- and Spanish-speaking samples. Correlations with other measures of social anxiety also showed good validity for the SASA.