Abstract: The invention relates to a lock for containers on a vehicle chassis, in particular on a gooseneck chassis, with a housing (21), a displaceable bolt lock (35) mounted in the housing and a pivotable twist lock (28) mounted in the housing. Usually, such locks with two locking members also have a plurality of actuating members. These require additional openings and bores in the housing. The operating personnel must also know exactly how the latching mechanism operates. In the lock according to the invention, the bolt lock (35) and the twist lock (28) are connected to each other by means of a geared coupling in such a way that when the twist lock is actuated the bolt lock is also displaced and/or the twist lock is turned when the bolt lock is actuated.