A packing method to pack articles, in particular straws, comprising the steps of: moving, by means of a first, preferably rotary conveyor, first seats, each designed to house an article, along a first path and with a first moving speed; moving, by means of a second, preferably rotary conveyor, second seats, each designed to house an article, along a second path and with a second moving speed; feeding, in a first feeding station arranged along the second path, in each second seat a portion of a first continuous band of wrapping material which is arranged in the second seat so as to define a pocket; cyclically transferring an article from a first seat to a second seat in a transfer station, where the two paths (P1, P2) face one another and which is arranged downstream of the first feeding station in order to insert the article in a corresponding pocket provided in the second seat; and applying, in a second feeding station arranged along the second path downstream of the transfer station, to the first continuous band of wrapping material, a second continuous band of wrapping material that closes the pockets containing the articles and which are arranged in the second seats; wherein, in case of normal operation during which all the first seats contain transferable articles, the first moving speed is functionally equal to the second moving speed, so that, within a same time frame, the same number of first and second seats (18, 23) move through the transfer station; the packing method is characterized in that a first seat is identified as not containing a transferable article because it is empty from the beginning of the first path (Pl) or because the article contained in the first seat is identified as defective and therefore to be rejected; and in that it comprises, in case of at least a first seat not containing a transferable article, the further steps of: functionally decreasing the second moving speed relative to the first moving speed so that, within a same exchange time interval, in which one single second seat passes through the transfer station, at least two first seats, one of which does not contain a transferable article and one of which contains a transferable article, pass through the transfer station; and transferring, in the transfer station and during the exchange time interval, the single transferable article from a corresponding first seat to a corresponding second seat. moving, by means of a first, preferably rotary conveyor, first seats, each designed to house an article, along a first path and with a first moving speed; moving, by means of a second, preferably rotary conveyor, second seats, each designed to house an article, along a second path and with a second moving speed; feeding, in a first feeding station arranged along the second path, in each second seat a portion of a first continuous band of wrapping material which is arranged in the second seat so as to define a pocket; cyclically transferring an article from a first seat to a second seat in a transfer station, where the two paths (P1, P2) face one another and which is arranged downstream of the first feeding station in order to insert the article in a corresponding pocket provided in the second seat; and applying, in a second feeding station arranged along the second path downstream of the transfer station, to the first continuous band of wrapping material, a second continuous band of wrapping material that closes the pockets containing the articles and which are arranged in the second seats; wherein, in case of normal operation during which all the first seats contain transferable articles, the first moving speed is functionally equal to the second moving speed, so that, within a same time frame, the same number of first and second seats (18, 23) move through the transfer station; the packing method is characterized in that a first seat is identified as not containing a transferable article because it is empty from the beginning of the first path (Pl) or because the article contained in the first seat is identified as defective and therefore to be rejected; and in that it comprises, in case of at least a first seat not containing a transferable article, the further steps of: functionally decreasing the second moving speed relative to the first moving speed so that, within a same exchange time interval, in which one single second seat passes through the transfer station, at least two first seats, one of which does not contain a transferable article and one of which contains a transferable article, pass through the transfer station; and transferring, in the transfer station and during the exchange time interval, the single transferable article from a corresponding first seat to a corresponding second seat. functionally decreasing the second moving speed relative to the first moving speed so that, within a same exchange time interval, in which one single second seat passes through the transfer station, at least two first seats, one of which does not contain a transferable article and one of which contains a transferable article, pass through the transfer station; and transferring, in the transfer station and during the exchange time interval, the single transferable article from a corresponding first seat to a corresponding second seat.