A rigid packet (1) of smoking articles having: a parallelepiped-shaped container (2) and has a front wall (9), a rear wall (10), a bottom wall (8) and two lateral walls (11); a single inner package (3), which encloses a group of smoking articles, is housed inside the container (2), and has a smaller cross dimension with respect to the cross dimension of the container (2); a lid (5) which is hinged to the container (2) to close an open top end (4) of the container (2) itself; and a collar (12), which is arranged inside the container (2) so as to project partly outwards of the open top end (4); the collar (12) has an intermediate partition wall (17) which is arranged in a central position and divides the inner volume of the container (2) itself into an open-topped main chamber (18) housing the inner package (3) and into a secondary chamber (19) arranged side by side to the main chamber (18).