Brake apparatus for vehicle

A brake apparatus for a vehicle, the brake apparatus comprising:

• a pair of brake pads that are disposed to face each other on a caliper body and disposed on two sides of a wheel disc, respectively;
• a first worm shaft part that is connected to a motor part and located inside a housing part;
• a first worm wheel part that is located inside the housing part, is engaged with the first worm shaft part, and rotates with rotation of the first worm shaft part;
• a second worm shaft part that is located inside the housing part, is connected to the first worm wheel part, and rotates together with the first worm wheel part when the first worm wheel part rotates;
• a second worm wheel part that is engaged with the second worm shaft part, and includes a plurality of second gear teeth each including a second enveloping gear tooth portion having a second inclined portion that increases in height toward one end side from a center portion thereof and a second helical gear tooth portion having a constant height from the center portion to another end side;
• and
• a linear motion conversion unit that is coupled to the second worm wheel part is configured to convert a rotational motion of the second worm wheel part into a linear motion and to press any one of the pair of brake pads.