Abstract: A quick-change track lock for securing interior-design articles on C-shaped retaining tracks on a floor or walls in an airplane, a helicopter or a spacecraft includes a main body, a detent member for fixing the track lock in a retaining track, a locking body having mushroom-shaped locking members operable for engagement with undercut portions of the retaining track and a pivotable actuating lever cooperating with the locking body to displace the latter relative to the main body. The locking body is guided in the main body such that a distance between each locking member and clamping edges of the main body becomes smaller when the locking body is displaced from one placed position to a locked position.