<p>A brake fluid pressure retaining unit (RU) for retaining brake fluid pressure within a wheel cylinder (WC) after releasing a brake pedal (BP) is disclosed. The brake fluid pressure retaining unit comprises a brake fluid pressure reduction speed control means for retaining reduction speed of the brake fluid pressure within the wheel cylinder less than that of brake pedal load applied by a driver. The brake fluid pressure reduction speed control means may be formed by a restriction (D) in a brake fluid pressure circuit arranged between a master cylinder (MC) at which the brake fluid pressure is generated in accordance with a brake pedal load applied by the driver and the wheel cylinder. <IMAGE></p>
