<p>When the engine is restarted because a booster pressure (Pb) that is calculated while the engine is stopped becomes closer to atmospheric pressure than a restart reference value (Pbth1) that is set as a reference for determining whether the engine is to be restarted, a brake ECU performs a holding control for holding braking force with respect to a wheel by maintaining a wheel cylinder pressure (Pwc) for a wheel cylinder (second timing (t12)).</p>
