The invention relates to a suction bag emptying device (13) comprising a container (15) with a lid for a suction bag to be placed into the container. The container (15) has a discharge point (17) for removal of the contents of the suction bag. The emptying device (13) is provided with a holder for suspending a suction bag with a lid from the holder by the lid, and a jacket (24) for lateral support of the suction bag. The lid (14) of the emptying device (13) is provided with means for puncturing the lid (4) of the suction bag (3) and for supplying pressurized liquid or gas into the suction bag (3). The invention also relates to an assembly comprising at least one suction bag (3) and a suction bag emptying device (13), and to a method for emptying the suction bag (3).
