Abstract: A seal-locking mechanism is intended for seal-locking of railway wagons and containers and other objects such as, for example, warehouses, depots, shops, tanks, hatches and automobiles.The seal-locking mechanism comprises a body 1, a locking element 3 having unilaterally beveled serrations 6 contacting, when locking, with respective serrations made on separate fixing elements 7 located in the body 1 over conical surfaces and spring-loaded with respect to said body. The seal-locking mechanism may be provided with a cap 13 which, when locating on the body 1, results in the formation of a single cylindrical surface of the seal-locking mechanism. The locking element 3 is made i nthe form of a cylindrical rod having a head 4 in close proximity to which, on a its lateral surface, there is provided a ring-shaped boring 11. A required information is applied to the face of the head 4 of the locking element 3.