A rigid packet (1) of smoking articles having: a parallelepiped-shaped container (2), which has a front wall (9), a rear wall (10), a bottom wall (8) and two lateral walls (11 ); at least one 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 two partition walls (17), which extend from the front wall (9) of the container (2) to the rear wall (10) of the container (2) and which divide the inner volume of the container (2) in three separate chambers (18, 19).