The present invention relates to a drive device for displacing the flap (1) of the vehicle between a closed position and an open position, at least one spring member (2a, 2b) to have a spring device (2), and at least one drive motor (3a), and when the motor (3) with a gear unit (3b) connected to a rear portion of the drive motor (3a) is provided in accordance with the spring unit (2) and the motor (3) are each flap (1) and is coupled to drive the technical and the flap motor unit (1) in order to displace the 3 acts on against the flap (1) to the spring device (2) via a motor drive train (4), the motor the drive train (4) comprises a flexible force transmission member (5) for transmitting the driving motion. Into the compensation device (6) is inserted into the motor drive train (4), the compensating device 6 is drawing direction (7), as opposed to a motor drive train (4) of the flexible force transmission member (5) in accordance with the invention for exercise to be introduced, particularly in the case of manual displacement in the closing direction of the flap (1), pull the flexible force transmission member (5) is driven in particular by the spring force.