The highly protective quality of the safety belt remains undisputed. Nevertheless, it is evident, that almost the same injuries may occur whcther or not a safety belt is used. Cognitions can be derived from this study in which accident and collision situations injuries are inflicted to belt-protected drivers, co-drivers and rear-seat passengers. On the basis of documented traffic accidents, investigated by a scientific research team, a total of 1,865 single injuries incurred by 505 belt-protected front-seat and 35 rearseat car passengers were analyzed. It became evident that in frontal cotlisions and protection by safety belt, a high injury risk still remained for car passengers, for instance for the knee region by the dashboard, for thorax and head region by the steering wheel. In lateral collisions, injuries to the whole body were caused by the side structures of the doors. This situation must be regarded as a challenge for modification by car constructors.