To stabilize a behavior of a vehicle certainly and effectively, by preventing increase of a behavior control quantity or delay of start of behavior control in starting the behavior control.

This behavior control device discriminates whether or not deviation between a desired yaw rate γt of a vehicle and a real yaw rate γ of the vehicle is large and the behavior of the vehicle degrades a little (S50), and discriminates whether or not a force in the direction along a road surface received by the vehicle from the road surface is large and the behavior of the vehicle can degrade based on a horizontal acceleration Gxy of the vehicle (S70). The behavior control device allows the behavior control when one of the above conditions is satisfied (S110, 120, and 160), and performs the behavior control when the behavior of the vehicle degrades actually (S170 to 190). The allowance of the behavior control is continued for a predetermined period after none of the above conditions is satisfied (S130 to 150).