Abstract.Having an adequate knowledge of mental disorders is valuable for recognizing, preventing and treating them effectively. This study explored the adolescence's general knowledge of mental disorders (mental health literacy) in Surakarta, Indonesia. Data was collected by an open ended questionaire developed from Jorm's theory of mental health literacy. There were 130 students from 5 junior dan senior high schools in Surakarta who participated in this study. Descriptive analysis was taken to all data. Results showed that students's mental health literacy were not adequate. Their knowledge about mental disorder were not comprehensive.