A packing method for producing a sealed package containing a group of cylindrical tobacco articles, the packing method comprising the steps of: coupling the group of tobacco articles with a stiffener comprising a front wall oriented longitudinally and positioned contacting the cylindrical lateral walls of the tobacco articles; and two lateral walls located on opposite sides of the front wall, positioned contacting the cylindrical lateral walls of the tobacco articles, and oriented crosswise to a packing path; feeding the group of tobacco articles, coupled with the stiffener, along the packing path on a packing conveyor; folding a strip of packing material longitudinally, i.e. parallel to the packing path, about the packing path to bring the two opposite edges of the strip of packing material into contact and so form a tubular wrapping enclosing the group of tobacco articles coupled with the stiffener; heat-sealing the two opposite overlapping edges of the strip of packing material longitudinally, i.e. parallel to the packing path, to stabilize the tubular wrapping; and heat-sealing and cutting the tubular wrapping transversely, i.e. perpendicularly to the packing path, upstream and downstream from the group of tobacco articles coupled with the stiffener, to complete the sealed package; wherein the group of tobacco articles coupled with the stiffener is fed transversely along the packing path, i.e. with the longitudinal axes of the tobacco articles perpendicular to the packing path and to the longitudinal heat-seal, and parallel to the transverse heat-seals; the packing method being characterized in that: the stiffener comprises a bottom wall positioned contacting the tips of the tobacco articles and oriented longitudinally with respect to the packing path; and the stiffener comprises a connecting system connecting the bottom wall and the lateral walls of the stiffener, and which prevents the two lateral walls from moving with respect to the bottom wall. coupling the group of tobacco articles with a stiffener comprising a front wall oriented longitudinally and positioned contacting the cylindrical lateral walls of the tobacco articles; and two lateral walls located on opposite sides of the front wall, positioned contacting the cylindrical lateral walls of the tobacco articles, and oriented crosswise to a packing path; feeding the group of tobacco articles, coupled with the stiffener, along the packing path on a packing conveyor; folding a strip of packing material longitudinally, i.e. parallel to the packing path, about the packing path to bring the two opposite edges of the strip of packing material into contact and so form a tubular wrapping enclosing the group of tobacco articles coupled with the stiffener; heat-sealing the two opposite overlapping edges of the strip of packing material longitudinally, i.e. parallel to the packing path, to stabilize the tubular wrapping; and heat-sealing and cutting the tubular wrapping transversely, i.e. perpendicularly to the packing path, upstream and downstream from the group of tobacco articles coupled with the stiffener, to complete the sealed package; the stiffener comprises a bottom wall positioned contacting the tips of the tobacco articles and oriented longitudinally with respect to the packing path; and the stiffener comprises a connecting system connecting the bottom wall and the lateral walls of the stiffener, and which prevents the two lateral walls from moving with respect to the bottom wall.