The present invention relates to an arrangement (1) for packing banknotes (2) that are received in a closed cassette (3) which is capable of detachable attachment to an emptying machine (5). In accordance with the invention, a path leads from the emptying machine (5) for the transfer of banknotes (2)to a packing machine (6) for banknotes (2). The aforementioned packing machine (6) comprises a holder for supporting security bags and a banknote conveyor which comprises a casing capable of displacement relative to the bag holder and extending internally in the bag in question prepared for receiving. In order among other things to force out air from the bag, movable jaws arranged relative to one another are present, situated to either side of a bag receiving space, and the aforementioned jaws are so arranged as to drive a bag threaded around the case in a downwards direction.