Abstract
It was reported that the seat arrangement with rotating seat inward or outward improves occupant's comfort. The seat rotational function can be put into practical use with consideration for the influence of occupant safety in a collision. In this study, the influence of rotating seat in side impact was clarified by using MADYMO simulation software. The quality engineering was carried out and effective parameters were clarified to control the impact behavior of occupant and to reduce head and chest injury criteria.