Abstract : People who have mental disorders in West Java, Indonesia, are still in stocks for various reasons. people They cannot control their behavior. Their behavior is at risk of injuring themself, others, and the environment. This study aimed to analyze the effect of anthocyanin and assertive supportive group therapy on the ability to overcome the violent behavior of Schizophrenia patients in the West Java Provincial Hospital. Design this research was a Quasi-experimental research design with a pre-post test control design approach. Total samples were 36 patients, every 18 patients for the treatment and control groups. The treatment group was given assertive supportive group for 4 days. In the intervention group, after the post-test, patients were given food containing anthocyanin in the form of black sticky rice bars twice a day for 10 days. The results showed a significant difference after therapy in the assertive supportive group in the treatment group and the control group (p-value 0.000). At the same time, the anthocyanin nutrient administration did not affect (p-value 0.292). There was an effect of assertive supportive group therapy on the ability to overcome the violent behavior of Schizophrenia patients in a psychiatric hospital, West Java, Indonesia. Also, anthocyanin can bit increase the average value of the ability to cope with violent behavior. Recommendations for effective assertive supportive therapy are carried out in small groups.