A balancing device for abrupt braking of a vehicle is provided to maintain the balance of the vehicle when abrupt braking of the vehicle occurs to generate collision between bumpers to thereby improve safety of a user. A balancing device for abrupt braking of a vehicle includes a vertically moving cylinder(20), a balanced cylinder, a fluid tank(30), and a connecting pipe(40). The vertically moving cylinder is located between a front wheel suspension low arm(103) and a car body frame(104) of the vehicle. The balanced cylinder is horizontally arranged behind the vertically moving cylinder, contains a fluid which operates the vertically moving cylinder and includes a weight piston(23). The fluid tank is located on the balanced cylinder. The connecting pipe connects the fluid between the vertically moving cylinder and the balanced cylinder.
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