In a vehicle brake device having a hydraulic pressure sensor for detecting an output value corresponding to the pressure of a fluid pressure adjusted by a master cylinder and a master cylinder pressure calculating unit for storing the output value of the hydraulic pressure sensor at which the pressure of the master cylinder becomes 0 as a zero-point correction value and calculating a master cylinder pressure by correcting the output value of the hydraulic pressure sensor based on the zero-point correction value, the vehicle brake device has a zero-point correction value updating unit for setting, when the output value detected by the hydraulic pressure sensor is smaller than the zero-point correction value stored in the master cylinder pressure calculating unit, the output value as a new zero-point correction value and updating the zero-point correction value.