A valve drive arrangement for actuating gas exchange valves of an internal combustion engine having a camshaft, on which first and second cam carriers are arranged on first and second contact regions in a non-positive and/or positively locking manner, the first cam carrier having at least one cam for actuating a gas exchange valve and the second cam carrier having at least one cam for actuating an ancillary unit, the first contact region being configured with regard to the geometric dimensions differently in relation to the second contact region in such a way that the second cam carrier can be mounted, without being impeded by the contact regions for the first cam carrier.