Parking device for parking objects, in particular vehicles, at least comprising: - at least one platform which can be positioned relative to an access opening by a movement device and which has a parking surface, and - a gate device arranged in the access opening, wherein the gate device is for closing the access opening, - two vertically aligned guide rails (2, 3) which laterally delimit the access opening - an outer gate element which is displaceably mounted in or on a vertically aligned outer guide of the guide rails (2, 3), - an inner gate element which is displaceably mounted in or on an inner guide of the guide rails (2, 3) which extends parallel adjacent to the outer guide, - wherein the inner gate element, in a closed position of the gate device, is arranged in a first region of the access opening which is lower than a second region in which the outer gate element is arranged, and - wherein the outer gate element and the inner gate element are arranged in an open position of the gate device in a third area of the access opening which is higher than the first and second areas (B1, B2), - with a locking element for effecting a locking state in which the locking element locks the displaceable mounting of the inner gate element relative to the two guide rails (2, 3) in the closed position, and - with a coupling element on one of the inner and outer gate elements (20, 30) which cooperates with the other of the inner and outer gate elements (20, 30) in such a way that the locking element locks the displaceable mounting of the outer gate element in the locked state relative to the two guide rails (2, 3) indirectly via the inner gate element. - at least one platform which can be positioned relative to an access opening by a movement device and which has a parking surface, and - a gate device arranged in the access opening, wherein the gate device is for closing the access opening, - two vertically aligned guide rails (2, 3) which laterally delimit the access opening - an outer gate element which is displaceably mounted in or on a vertically aligned outer guide of the guide rails (2, 3), - an inner gate element which is displaceably mounted in or on an inner guide of the guide rails (2, 3) which extends parallel adjacent to the outer guide, - wherein the inner gate element, in a closed position of the gate device, is arranged in a first region of the access opening which is lower than a second region in which the outer gate element is arranged, and - wherein the outer gate element and the inner gate element are arranged in an open position of the gate device in a third area of the access opening which is higher than the first and second areas (B1, B2), - with a locking element for effecting a locking state in which the locking element locks the displaceable mounting of the inner gate element relative to the two guide rails (2, 3) in the closed position, and - with a coupling element on one of the inner and outer gate elements (20, 30) which cooperates with the other of the inner and outer gate elements (20, 30) in such a way that the locking element locks the displaceable mounting of the outer gate element in the locked state relative to the two guide rails (2, 3) indirectly via the inner gate element.