A packaging machine for making filter bags with infusion products, said filter bags comprising at least one closed containment chamber having two large faces (1a, 1b) facing each other which extend from a bottom, said bottom having a smaller surface than said two large faces (1a, 1b), said machine comprising a plurality of processing stations defining a processing path and configured for making filter bags for infusion products and an extraction station situated immediately downstream of the processing stations along the processing path; said extraction station comprising: - a stacking unit comprising a guide channel having a rectilinear stretch and configured to allow the ordered and continuous feeding of the superposed filter bags to form a stack to be extracted from the machine; - transfer means configured for transferring said filter bags coming from the processing path to said stacking unit characterised in that said stacking unit further comprises a connecting element positioned downstream of the processing stations and upstream of the guide channel, and configured for receiving as input from the transfer means the filter bags coming from the processing path; said connecting element connecting in outlet with the guide channel in which the filter bags are introduced before being extracted from the machine, and comprising a chute surface having a curved stretch shaped to allow the feeding of the filter bags along a feed direction, and in that said transfer means are configured and actuated in such a way as to individually pick up in succession the filter bags from a station of said plurality of processing stations and positioning individually in succession the filter bags arranged according to an orientation such as to form a stack of filter bags superposed on each other along the feed direction, with the respective large faces (1a, 1b) positioned transversal to the feed direction and with the respective bottoms positioned side by side resting on the chute surface of the connecting element. said extraction station comprising: - a stacking unit comprising a guide channel having a rectilinear stretch and configured to allow the ordered and continuous feeding of the superposed filter bags to form a stack to be extracted from the machine; - transfer means configured for transferring said filter bags coming from the processing path to said stacking unit - a stacking unit comprising a guide channel having a rectilinear stretch and configured to allow the ordered and continuous feeding of the superposed filter bags to form a stack to be extracted from the machine; - transfer means configured for transferring said filter bags coming from the processing path to said stacking unit characterised in that said stacking unit further comprises a connecting element positioned downstream of the processing stations and upstream of the guide channel, and configured for receiving as input from the transfer means the filter bags coming from the processing path; said connecting element connecting in outlet with the guide channel in which the filter bags are introduced before being extracted from the machine, and comprising a chute surface having a curved stretch shaped to allow the feeding of the filter bags along a feed direction, and in that said transfer means are configured and actuated in such a way as to individually pick up in succession the filter bags from a station of said plurality of processing stations and positioning individually in succession the filter bags arranged according to an orientation such as to form a stack of filter bags superposed on each other along the feed direction, with the respective large faces (1a, 1b) positioned transversal to the feed direction and with the respective bottoms positioned side by side resting on the chute surface of the connecting element.