A packet of smoking articles, comprising: a cup-shaped outer container having an open top end, a bottom wall opposite to the open top end, a front wall and an opposite, parallel rear wall, and two opposite, parallel lateral walls; a cup-shaped lid hinged to the outer container to rotate, with respect to the outer container, between an open position and a closed position of the open top end, and having an open bottom end, a top wall, a front wall and an opposite, parallel rear wall, and two opposite, parallel lateral walls; a group of articles; an inner package which encloses the group of articles, is housed inside the outer container, and at the top and front has a lift-up portion separated from the rest of the inner package by a pre-weakened U-shaped parting line which is torn completely the first time the packet of smoking articles is opened, to expose an article extraction opening, and without the interposition of other elements is directly in contact with an inner surface of the top wall of the lid and with an inner surface of the front wall of the lid; the packet of smoking articles is characterized in that: a stiffener is provided, which is made of rigid material, is arranged inside the inner package contacting the group of articles, and comprises a front wall with a U-shaped window, and two lateral walls connected to opposite sides of the front wall; the lift-up portion has a bottom end which is arranged at a front wall of the inner package, and which rests on the front wall of the stiffener, below the window; and the front wall of the stiffener has a first band of glue, which is arranged on an outer surface of the front wall at the bottom end of the lift-up portion so as to glue the bottom end of the lift-up portion to the front wall. a cup-shaped outer container having an open top end, a bottom wall opposite to the open top end, a front wall and an opposite, parallel rear wall, and two opposite, parallel lateral walls; a cup-shaped lid hinged to the outer container to rotate, with respect to the outer container, between an open position and a closed position of the open top end, and having an open bottom end, a top wall, a front wall and an opposite, parallel rear wall, and two opposite, parallel lateral walls; a group of articles; an inner package which encloses the group of articles, is housed inside the outer container, and at the top and front has a lift-up portion separated from the rest of the inner package by a pre-weakened U-shaped parting line which is torn completely the first time the packet of smoking articles is opened, to expose an article extraction opening, and without the interposition of other elements is directly in contact with an inner surface of the top wall of the lid and with an inner surface of the front wall of the lid; the packet of smoking articles is characterized in that: a stiffener is provided, which is made of rigid material, is arranged inside the inner package contacting the group of articles, and comprises a front wall with a U-shaped window, and two lateral walls connected to opposite sides of the front wall; the lift-up portion has a bottom end which is arranged at a front wall of the inner package, and which rests on the front wall of the stiffener, below the window; and the front wall of the stiffener has a first band of glue, which is arranged on an outer surface of the front wall at the bottom end of the lift-up portion so as to glue the bottom end of the lift-up portion to the front wall. a stiffener is provided, which is made of rigid material, is arranged inside the inner package contacting the group of articles, and comprises a front wall with a U-shaped window, and two lateral walls connected to opposite sides of the front wall; the lift-up portion has a bottom end which is arranged at a front wall of the inner package, and which rests on the front wall of the stiffener, below the window; and the front wall of the stiffener has a first band of glue, which is arranged on an outer surface of the front wall at the bottom end of the lift-up portion so as to glue the bottom end of the lift-up portion to the front wall.