To provide a vehicle behavior controller capable of attaining at least either the prevention of noise or the improvement of responsiveness of control.

This vehicle behavior controller 1 includes a rotary body 21 supported rotatably around a rotary shaft 22 relative to a vehicle 100, a gyroscope 2 being a gyro-motor generator for rotating the rotary body 21, a vehicle speed sensor 4 for detecting the speed V of the vehicle 100, and a gimbal 3 composed of a rotary shaft 33 for supporting the gyroscope 2 to rotate around the rotary shaft 33 crossing the rotary shaft 22 of the rotary body 21 orthogonally and a gimbal motor 34 for rotating the gyroscope 2. This vehicle behavior controller 1 increases the centrifugal force to be generated in the rotary body 21 in accordance with the increase of a detected vehicle speed V and generates gyro-moment by utilizing the centrifugal force of the rotary body 21 based on behavior of the vehicle 100.

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