Packaging apparatus of sachets comprising a primary packaging unit, a secondary packaging unit, and a transfer unit interposed between the primary and the secondary packaging units in order to transfer the sachets between the primary and secondary packaging units, wherein the transfer unit comprises at least three transfer drawers disposed one after the other, selectively movable independently along a closed-ring path between a reception station and a delivery station and vice versa, each of the transfer drawers being configured to contain a first number of sachets and the transfer unit comprising a removal member associated with the delivery station and configured to remove from one or more of the transfer drawers a second number of sachets and to supply them to the secondary packaging unit. The present invention also concerns a method for packaging sachets.