To provide a vehicle behavior controller for improving a roll transient response in turning in a high vehicle where especially a distance between a center of gravity on a spring and a roll shaft is large.

The vehicle behavior controller is provided with a rear wheel steering device 4 for applying an auxiliary steering angle to a rear wheel 3 and each driving/braking force distributing device 5 for applying a yaw moment to a vehicle. The vehicle behavior controller is provided with a control controller 10 for controlling the driving of the rear wheel steering device 4 in order to offset any lateral force to be generated due to the roll operation of a body, and for controlling the driving of each wheel driving/braking force distributing device 5 in order to offset any yaw moment to be generated under rear wheel steering angle control.

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