A vehicle door apparatus includes: an opening and closing drive device capable of opening and closing a swing door provided in a vehicle; and a control device configured to control the opening and closing drive device. The control device includes: an occupant detection unit configured to detect an occupant of the vehicle who approaches the door; a first opening operation control unit configured to open the door to a first opening degree when the occupant has entered an opening control area from a proximal end side of the door; and a second opening operation control unit configured to open the door from the first opening degree to a second opening degree when the occupant has moved to a free end side of the door beyond an opening operation trajectory of the door.