A closure device for releasably connecting two parts with each other, comprising - a first closure member (2, 2a, 2b, 2c, 2d) having a rigid first locking protrusion and - a second closure member (3, 3a, 3b, 3c, 3d) which is attachable to the first closure member (2, 2a, 2b, 2c, 2d) and in a closed position is held on the first closure member (2, 2a, 2b, 2c, 2d), the second closure member (3, 3a, 3b, 3c, 3d) having a rigid second locking protrusion, wherein the second locking protrusion can be brought into engagement with the first locking protrusion in an engagement direction and in the closed position engages the first locking protrusion in a positive locking manner, - wherein the first closure member (2, 2a, 2b, 2c, 2d) comprises a first magnetic member (23, 23A, 23B) and the second closure member (3, 3a, 3b, 3c, 3d) comprises a second magnetic member (33, 33A, 33B), the first magnetic member (23, 23A, 23B) and the second magnetic member (33, 33A, 33B) being constituted to magnetically attract each other when the second closure member (3, 3a, 3b, 3c, 3d) is attached to the first closure member (2, 2a, 2b, 2c, 2d) for closing the closure device, characterized in that - a force application element (31, 31a, 31b, 31c, 31d) is attached to the second closure member (3, 3a, 3b, 3c, 3d) at a force application location in the vicinity of the second locking protrusion, the force application element (31, 31a, 31b, 31c, 31d) being constituted to introduce a force into the second closure member (3, 3a, 3b, 3c, 3d) and - the closure device comprises at least two first and/or two second closure members (2, 3; 2a, 3a; 2b, 3b; 2c, 3c; 2d, 3d) being coupled with each other by means of at least one coupling element (37; 5; 6). - a first closure member (2, 2a, 2b, 2c, 2d) having a rigid first locking protrusion and - a second closure member (3, 3a, 3b, 3c, 3d) which is attachable to the first closure member (2, 2a, 2b, 2c, 2d) and in a closed position is held on the first closure member (2, 2a, 2b, 2c, 2d), the second closure member (3, 3a, 3b, 3c, 3d) having a rigid second locking protrusion, wherein the second locking protrusion can be brought into engagement with the first locking protrusion in an engagement direction and in the closed position engages the first locking protrusion in a positive locking manner, - wherein the first closure member (2, 2a, 2b, 2c, 2d) comprises a first magnetic member (23, 23A, 23B) and the second closure member (3, 3a, 3b, 3c, 3d) comprises a second magnetic member (33, 33A, 33B), the first magnetic member (23, 23A, 23B) and the second magnetic member (33, 33A, 33B) being constituted to magnetically attract each other when the second closure member (3, 3a, 3b, 3c, 3d) is attached to the first closure member (2, 2a, 2b, 2c, 2d) for closing the closure device, - a force application element (31, 31a, 31b, 31c, 31d) is attached to the second closure member (3, 3a, 3b, 3c, 3d) at a force application location in the vicinity of the second locking protrusion, the force application element (31, 31a, 31b, 31c, 31d) being constituted to introduce a force into the second closure member (3, 3a, 3b, 3c, 3d) and - the closure device comprises at least two first and/or two second closure members (2, 3; 2a, 3a; 2b, 3b; 2c, 3c; 2d, 3d) being coupled with each other by means of at least one coupling element (37; 5; 6).