PURPOSE: To improve a combination lock comprising four adjusting buttons and a handle for driving a bold controlled by the adjusting button, for relatively larger numbers of combinations, which is low-cost to manufacture, and ensures operation.

CONSTITUTION: A base disc comprising 'n' number of teeth is born with four baring sleeves, the base disc comprises a radial groove on its peripheral surface, and a cross-shaped scan lock member 11 is swivel-mounted between the base discs. These scan lock members comprise a small projection and engagement block member, and a catch disc comprising 'n' number of teeth and square- shaped hole is born on the base disc. An adjusting button penetrates into the catch disc, while each base plate comprising a hole with a coupling pin, and the coup-ling pin engages the conical bore of a switch plate as well as that of the catch disc, with a switch plate 6 which is swivel-mounted operated by a control groove 2 of a bolt 5.