Abstract
Recently, one of the most important appeal points of a wagon type vehicle is the spaciousness of the rear seat with the long slide adjuster. But if the sheet position of the vehicle is changed, there is a possibility of influencing the occupant injury. Therefore, the quality engineering was applied to vehicle collision tests using scale models and the safety performance of the rear seat occupant was examined. As a result, it was confirmed that the change for the relative position between the shoulder belt anchor position and the occupant greatly influenced the occupant restraint.