The purpose of this study was to see actual Prevention Medical Accidents for Mental Disorders in the hospital, and he relation between Prevention Medical Accident and Daily Safety care, Worke's situation. The sample analysis was done with 6,233 psychiatric nurses who worked at a hospital word in the whole country more than one hundred bed. Th results were as follows : All Prevention of Medical Accidents scores more than point 4 except <conferrence for analysis of an accidents case>. Most high scores were check on job, and submit a report about an accident. Prevention of Medical Accidents scores were significant as for senior woman than man, higher position and with more experiencing of nursing, care points increased. Daily Safety care scores more than point 4 were 8 items, the others not more than point 4. Worke's situation scores ruled low in comparison with Prevention of Medical Accidents scores. Prevention of Medical Accidents and Daily Safety care, Worke's situation were relative. Especially conferrence cope for side effect education about safety management, be given a opportunity for traning, and human support. These findings discuss that it is important to Safety care for Mental disorders at the ward.