Cutting device, particularly a lawn mower

A cutting device comprising at least one rotating knife (1) mounted on a rotating, motor-driven knife carrier (3) by a screwless, detachable connection, the connection being detachable by a relative rotation between the knife (1) and the knife carrier (3), wherein the connection between the at least one knife (1) and the knife carrier (3) comprises a centrally arranged bayonet lock (2a to 2f;

• 14a to 14c), wherein the bayonet lock is stopped in a closed position by at least one additional, adjustable locking element (5), wherein the knife has an opening (2) with radial recesses (2a to 2c) and/or radial projections (2d to 2f) in its center, at least one recess and/or projection of which interacts with the locking element (5), wherein in a first position the locking element (5) blocks the relative rotation between the knife (1) and the knife carrier (3) in a positive manner, but in a second position releases the relative rotation, and wherein the locking element (5) has a form of a push button that is spring-mounted in the knife carrier, the push button releasing the relative rotation between the knife and the knife carrier (3) in a position pushed in against the spring tension.