Social anxiety is explained as noticeable anxiety or fear in one or more social situations where the individual is exposed to possible analysis by others. This research is aimed to determine the association between perfectionism and social anxiety among adolescents in Selangor, Malaysia. A final sample of 327 participants, between 13 to 18 years old, was collected. Data collection was conducted in two public secondary schools and two private high schools in Selangor. This survey included three instruments of analysis: The Child-Adolescent Perfectionism Scale, Kutcher Generalized Social Anxiety Disorder Scale for Adolescents and Demographic Questionnaire. The results showed that there is a significant positive association between perfectionism and social anxiety. This study has proved the positive association between perfectionism and social anxiety among adolescents in Selangor, Malaysia. Therefore, it is important to identify those students with these issues and guide them in an effective way to overcome the issues.