A driving action automatic evaluating system to evaluate a driving action of a driver of a motor vehicle with respect to a predetermined place, comprising: a head angular velocity sensor attached to a head of said driver arranged to measure angular velocity data of the head of said driver; a foot angular velocity sensor attached to the right foot of said driver arranged to measure angular velocity data of the right foot of said driver; a position detector arranged to detect position data of said motor vehicle; a recorder arranged to record at least said angular velocity data detected by said head angular velocity sensor, said angular velocity data detected by said foot angular velocity sensor, and said position data of said motor vehicle detected by said position detector; a motion defining data storage arranged to store motion defining data defining a minimum accident preventive motion to be performed for each predetermined place, wherein the motion defining data for a said predetermined place comprises data relating to at least a right-and-left checking motion of the head of the driver, a right foot position of the driver, and a vehicle speed for that predetermined place, wherein the right-and-left checking motion for a said predetermined place comprises a respective predetermined visual checking motion for that predetermined place, wherein the right foot position of the driver indicates which pedal the right foot of the driver should be on for that predetermined place; a controller arranged to use said angular velocity data detected by said head angular velocity sensor to determine a right-and-left motion of the head of the driver, to use said angular velocity data detected by said foot angular velocity sensor to determine a right foot position of the driver, and to determine the vehicle speed of the motor vehicle; an evaluator arranged to evaluate whether or not said accident preventive motion is properly performed by the driver to determine an evaluation result for each predetermined place, wherein a said evaluation result for a said predetermined place is determined by comparing said determined right-and-left motion of the head of the driver at said predetermined place with the data in the motion defining data relating to the right-and-left checking motion of the head of the driver for said predetermined place, by comparing said determined right foot position of the driver at said predetermined place with the data in the motion defining data relating to the right foot position of the driver for said predetermined place, and by comparing for said determined vehicle speed at said predetermined place with the data in the motion defining data relating to vehicle speed for said predetermined place; and an outputter arranged to output an evaluation result by said evaluator. a head angular velocity sensor attached to a head of said driver arranged to measure angular velocity data of the head of said driver; a foot angular velocity sensor attached to the right foot of said driver arranged to measure angular velocity data of the right foot of said driver; a position detector arranged to detect position data of said motor vehicle; a recorder arranged to record at least said angular velocity data detected by said head angular velocity sensor, said angular velocity data detected by said foot angular velocity sensor, and said position data of said motor vehicle detected by said position detector; a motion defining data storage arranged to store motion defining data defining a minimum accident preventive motion to be performed for each predetermined place, wherein the motion defining data for a said predetermined place comprises data relating to at least a right-and-left checking motion of the head of the driver, a right foot position of the driver, and a vehicle speed for that predetermined place, wherein the right-and-left checking motion for a said predetermined place comprises a respective predetermined visual checking motion for that predetermined place, wherein the right foot position of the driver indicates which pedal the right foot of the driver should be on for that predetermined place; a controller arranged to use said angular velocity data detected by said head angular velocity sensor to determine a right-and-left motion of the head of the driver, to use said angular velocity data detected by said foot angular velocity sensor to determine a right foot position of the driver, and to determine the vehicle speed of the motor vehicle; an evaluator arranged to evaluate whether or not said accident preventive motion is properly performed by the driver to determine an evaluation result for each predetermined place, wherein a said evaluation result for a said predetermined place is determined by comparing said determined right-and-left motion of the head of the driver at said predetermined place with the data in the motion defining data relating to the right-and-left checking motion of the head of the driver for said predetermined place, by comparing said determined right foot position of the driver at said predetermined place with the data in the motion defining data relating to the right foot position of the driver for said predetermined place, and by comparing for said determined vehicle speed at said predetermined place with the data in the motion defining data relating to vehicle speed for said predetermined place; and an outputter arranged to output an evaluation result by said evaluator.