Jeon-zeong(癲證) is mostly caused by anxiety and melancholy, impairment of heart and the spleen, or stasis of phlegm-Gi and heart confused by phlegm. Its manifestation are characterized by depression, expressionlessness, inclination for quietness, self muttering and hallucinating, caprice in crying and laughing, paraphasia, loss of appetite, unawareness of filth and cleanness, etc. We experienced a 50year-old man who bad brief psycbotic disorder that specified with Marked Stressor and whose condition was improved through oriental medical treatment. We treated the patient with Herbal medications and Giungoroen (至言高論)-wise saying and lofty opinion) and Relaxation therapy. After being treated, the patient showed that symptoms (insomnia, anxiety, depression) was improved considerably. This result suggests that oriental medical treatment has good effect on brief psychotic disorder due to Marked Stressor.