A security locking for a cube cutter (1) of a kitchen appliance wherein the cover (6) is adapted to be attached to the cube cutter (1), whereby the cover (6) includes at least one automatic locking element (9, 10, 11), and the cube cutter (1) comprises a rotating blade (8) with at least one fastening element (3, 4, 5), and wherein said fastening elements (3, 4, 5) are automatically locked into the operating position when the cover (6) is attached to the cube cutter (1).