A vehicular brake system to be provided on a vehicle having wheels including a driving wheel (WFL, WFR) rotationally driven by an electrical motor and comprising: an electrical braking unit that supplies operational pressure generated in operational fluid by an electrical brake actuator to wheel cylinders (32FR, 32RL, 32RR, 32FL) and thereby applies friction braking force (Poil) to the wheels; a regenerative braking unit for applying regenerative braking force (Pmot) generated by the electrical motor to the driving wheel (WFL, WFR); and an antilock control unit (18, 150) for activating antilock control that increases and decreases the friction braking force (Poil) to stop slip of a wheel, wherein when the antilock control unit has determined that at least one slip wheel has occurred and activates the antilock control (at t1), the antilock control unit (18, 150) maintains a state where the regenerative braking force (Pmot) is applied to the driving wheel (WFL, WFR), characterized in that when the antilock control unit (18, 150) has determined (at t2) that slip ratio of the slip wheel has become smaller than or equal to a predetermined value, the antilock control unit (18, 150) opens an opening-closing unit (120, 124) for a supply passage supplying the operational pressure to the wheel cylinder provided at the slip wheel, to supply the operational pressure from the supply passage to the wheel cylinder, thereby increases the friction braking force (Poil) applied to the slip wheel, and decreases (t2 to t3) the regenerative braking force (Pmot) that is applied to the driving wheel (WFL, WFR) by the regenerative braking unit in a predetermined pattern during a delay time (Dtim) caused before the friction braking force (Poil) increases up to a requested braking force (Preq). an electrical braking unit that supplies operational pressure generated in operational fluid by an electrical brake actuator to wheel cylinders (32FR, 32RL, 32RR, 32FL) and thereby applies friction braking force (Poil) to the wheels; a regenerative braking unit for applying regenerative braking force (Pmot) generated by the electrical motor to the driving wheel (WFL, WFR); and an antilock control unit (18, 150) for activating antilock control that increases and decreases the friction braking force (Poil) to stop slip of a wheel, wherein when the antilock control unit has determined that at least one slip wheel has occurred and activates the antilock control (at t1), the antilock control unit (18, 150) maintains a state where the regenerative braking force (Pmot) is applied to the driving wheel (WFL, WFR), characterized in that when the antilock control unit (18, 150) has determined (at t2) that slip ratio of the slip wheel has become smaller than or equal to a predetermined value, the antilock control unit (18, 150) opens an opening-closing unit (120, 124) for a supply passage supplying the operational pressure to the wheel cylinder provided at the slip wheel, to supply the operational pressure from the supply passage to the wheel cylinder, thereby increases the friction braking force (Poil) applied to the slip wheel, and decreases (t2 to t3) the regenerative braking force (Pmot) that is applied to the driving wheel (WFL, WFR) by the regenerative braking unit in a predetermined pattern during a delay time (Dtim) caused before the friction braking force (Poil) increases up to a requested braking force (Preq).