Abstract: The automatic seats in a vehicle are designed to minimize the seriousness of car-crash injuries during a frontal collision. When the vehicle collides against the other vehicle or any other stationary objects at a relative velocity of 40 Km/h or up, the backrest is pushed to recline backward by the action of the springs together with various mechanisms especially designed. Spring of either torsion type or tension type is used. The collision results in pulling the upper part of the body of the driver or the occupants fastened by the designed safety-belts to recline backwards. Thus, the pelvis, the chest and the head of an occupant sitting on this automatic safety car seat are moved away to the farmost and thus, can avoid striking with the deforming frontal parts of the car intruding by the frontal collision. The chest injuries and the brain damage can then be effectively avoided.