A design support system has been developed for constructing VR-based training environments for machine maintenance work without any expertise knowledge and programming effort on VR. Using the developed system, the users can easily construct various training environments under GUI environment. It was verified through some experiments that the developed system can reduce the working hours remarkably and that novice users who have no prior knowledge on the system could construct a training environment successfully after a few hours of tutorial on the system. In this paper, the system configuration and experimental results are described.