The venture businesses deal with various kinds of hazard factors, that is, substances, processes and techniques, which have not been investigated. Nevertheless, the safety management systems of venture businesses are not systematic until now. And also it is very difficult to find out the cases of foreign advanced countries. In this study a questionnaire which investigate the present states of safety management system, have been excuted for 358 venture businesses. As a result, the present states of safety management system of venture business are assessmented, and the supporting direction of the safety management for venture business is proposed.