The invention provides a brake control device and a brake control method. A PCS ECU (20) of a PCS system (10) calculates a TTC that is the activation timing of the brake of a vehicle on the basis of the relative velocity (Vr) between the vehicle and an object, and a preset deceleration amount ([delta]V) produced by the activation of the brake of the vehicle, and deceleration (a) produced by the activation of the brake of the vehicle. Consequently, the deceleration amount ([delta]V) produced by the activation of the brake of the vehicle becomes a preset constant amount regardless of the relative velocity (Vr) between the vehicle and the object. Accordingly, the more appropriate deceleration amount ([delta]V) produced by the activation of the brake can be ensured.