A closure device for connecting a container to a frame of a vehicle, in particular of a two-wheeler or a three-wheeler, includes a first closure part which is to be arranged on the frame and comprises a first magnet element and a second closure part which is assigned to the container and comprises a second magnet element. The second closure part is positionable on the first closure part in a closing direction and is latched mechanically with the first closure part in a closed position. The second closure part is releasably connectable to the container.