Apparatus for determining turning vehicle condition

An apparatus for quickly and accurately determining a counter steer state of a vehicle is provided. The apparatus comprises a turning direction obtaining unit 70 obtaining a turning direction of a vehicle, an oversteer state determination unit 71 determining whether the vehicle is in an over steer state, a steering angle based yaw rate obtaining unit 72 obtaining a steering angle based yaw rate to be determined based at least on a steering angle, a lateral acceleration based yaw rate obtaining unit 73 based at least on a lateral acceleration, a counter steer state determination unit 74 determining that the vehicle is in a counter steer state against the vehicle turning in the vehicle turning direction if the steering angle based yaw rate obtained by the steering angle based yaw rate obtaining unit 72 is smaller than the lateral acceleration based yaw rate obtained by the lateral acceleration based yaw rate obtaining unit 73 when the oversteer state determination unit 71 determines that the vehicle is in the oversteer state for the vehicle turning in the vehicle turning direction obtained by the turning direction obtaining unit 70.