A vehicle door device is provided for preventing the door from holding the door in the fully open position and generating a resistance to the door opening and closing operation, and a part of the mechanism is not seen from the outside. The lever mechanism (21) of the door device of the vehicle according to the present invention rotates horizontally with respect to the vehicle body (5), whereby the door (10) is horizontally rotated in conjunction with the rotation of the link mechanism (21) is provided at a position where the link mechanism (21) is separated from the free end of the link mechanism (21), and the door (5) is moved between the fully closed position and the fully open position of the door opening (50) (4) is provided in the link portion between the inner wall of the door and the surface of the vehicle body (5) when the lever is moved to the fully open position; (40) which is configured to engage the latch (41) of the link portion (21s) when the door is moved to the fully open position.