A vehicle door device for installation in a doorway of a vehicle, comprising: double sliding doors that are provided as a pair and are able to open and close the doorway by moving along a side wall of the vehicle in a forward-rearward direction of the vehicle, the doors each having door trailing end sides that are end portion sides in an opening direction of the doors and door leading end sides that are end portion sides in a closing direction of the doors; a door open-close drive mechanism that is installed at one of the top and the bottom of the doors and drives the doors to be opened and closed; a vehicle width direction guiding mechanism that guides the doors so as to move in a vehicle width direction along with operation of the door open-close drive mechanism, the vehicle width direction being in use the width direction of the vehicle; and first pressing mechanisms that, when the doors are in a fully-closed position, are able to press the doors toward a vehicle body of the vehicle by pressing the doors outward in the vehicle width direction on the door trailing end sides; characterized in that the first pressing mechanisms press the doors such that the door leading end sides of the doors come into contact with each other when the doors are in the fully-closed position; and the vehicle door device comprises second pressing mechanisms that are installed, at the other of the top and the bottom of the doors, on the side opposite to the side on which the door open-close drive-mechanism is installed and, when the doors are in the fully-closed position, are able to press the doors toward the vehicle body by pressing the doors outward in the vehicle width direction on the door leading end sides. double sliding doors that are provided as a pair and are able to open and close the doorway by moving along a side wall of the vehicle in a forward-rearward direction of the vehicle, the doors each having door trailing end sides that are end portion sides in an opening direction of the doors and door leading end sides that are end portion sides in a closing direction of the doors; a door open-close drive mechanism that is installed at one of the top and the bottom of the doors and drives the doors to be opened and closed; a vehicle width direction guiding mechanism that guides the doors so as to move in a vehicle width direction along with operation of the door open-close drive mechanism, the vehicle width direction being in use the width direction of the vehicle; and first pressing mechanisms that, when the doors are in a fully-closed position, are able to press the doors toward a vehicle body of the vehicle by pressing the doors outward in the vehicle width direction on the door trailing end sides; characterized in that the first pressing mechanisms press the doors such that the door leading end sides of the doors come into contact with each other when the doors are in the fully-closed position; and the vehicle door device comprises second pressing mechanisms that are installed, at the other of the top and the bottom of the doors, on the side opposite to the side on which the door open-close drive-mechanism is installed and, when the doors are in the fully-closed position, are able to press the doors toward the vehicle body by pressing the doors outward in the vehicle width direction on the door leading end sides.