Abstract: The invention concerns a container or vehicle body comprising a floor (14), a roof (22) and vertical posts (5) for connecting the floor and the roof, a longitudinal side with a side opening, a side door (3, 6) for closing the side opening, a first hinge for connecting an upper rim (17) of the side door to an upper frame (21) of the side opening and a drive unit (12) for opening the side door from a closed position at one of the sides of the container or vehicle body to an open position above the roof. In accordance with the invention the drive unit comprises a drive link (24) connected by a second hinge (43) to the upper rim, a connecting part connected to the top of the side door and by a third hinge (42) to the drive link, a first actuator (28, 29) for rotating the drive link in the second hinge and a second actuator (31, 32) for rotating the connecting part (7) in the third hinge.