Brake device for vehicle

The invention relates to a brake apparatus for a vehicle. A brake apparatus for a vehicle may include: a first driver and a second driver configured to generate a driving force; a transmission gear part rotated by the driving force received from the first driver; a piston portion configured to press or release the pad portion according to a direction in which the piston portion moves forward or backward; a parking gear portion that rotates together with the transfer gear portion; a restraining part moving forward or backward in association with a driving force of the second driver, and configured to restrain rotation of the parking gear part by moving to one side during parking braking; and a lock portion configured to transmit the driving force generated by the second driver to the restraint portion and restrict movement of the restraint portion to the other side during parking braking. A brake apparatus for a vehicle may prevent random separation of a piston portion from a pad portion and loss of braking fo