A closure device for releasably connecting two parts, comprising a first closure part and a second closure part which can be attached to each other along a closing direction, are held at each other in a closed position, and can be released from each other for opening the closure device by separating the first closure part and the second closure part, wherein the second closure part includes an actuating element with a first engagement device and a winding element with a second engagement device, which is arranged on the actuating element and can be rotated in a winding direction for winding up a traction element, wherein in a release position the first engagement device and the second engagement device are not in engagement with each other so that the winding element can be rotated relative to the actuating element, and can be brought into engagement with each other so that in an engagement position the winding element can be rotated via the actuating element, wherein the first closure part includes a first meshing device and the second closure part includes a second meshing device, and in the closed position of the closure device the first meshing device and the second meshing device are in engagement with each other, wherein in the closed position the second closure part can be rotated relative to the first closure part in the winding direction, but a rotation of the second closure part relative to the first closure part against the winding direction is blocked, wherein the first engagement device and/or the second engagement device include a sawtooth-shaped toothing extended around the closing direction, wherein the first closure part and the second closure part each include at least one magnetic element (23, 33) for providing a force of magnetic attraction on attachment of the closure parts (2, 3) to each other. wherein the second closure part includes an actuating element with a first engagement device and a winding element with a second engagement device, which is arranged on the actuating element and can be rotated in a winding direction for winding up a traction element, wherein in a release position the first engagement device and the second engagement device are not in engagement with each other so that the winding element can be rotated relative to the actuating element, and can be brought into engagement with each other so that in an engagement position the winding element can be rotated via the actuating element, wherein the first closure part includes a first meshing device and the second closure part includes a second meshing device, and in the closed position of the closure device the first meshing device and the second meshing device are in engagement with each other, wherein in the closed position the second closure part can be rotated relative to the first closure part in the winding direction, but a rotation of the second closure part relative to the first closure part against the winding direction is blocked, wherein the first engagement device and/or the second engagement device include a sawtooth-shaped toothing extended around the closing direction, wherein the first closure part and the second closure part each include at least one magnetic element (23, 33) for providing a force of magnetic attraction on attachment of the closure parts (2, 3) to each other.