Abstract: An arrangement for compressing a product to be packed in a package before evacuation of the package which comprises a transport device for carrying a package into which a product has been introduced but which package has not yet been closed, into the range of activity of a piston, means for lowering the piston into the package to act on the free upper surface of the product so as to compress the material in the interior of the package uni-directionally, means for subjecting the package after said compression to evacuation to further reduce the internal pressure of the product to be packed and means for sealing and closing said package.