A pack for smoking articles comprising: a group of smoking articles; an inner wrap, which wraps the group of smoking articles; a rigid outer container, which is cup-shaped, houses the inner wrap and has an open upper end; a lid, which is cup-shaped, is hinged to the outer container along a hinge so as to rotate, relative to the outer container, between an open position and a closed position, and has: an open lower end, an upper wall, a front wall and a rear wall opposite one another, and two side walls opposite one another; a collar, which is folded in a "U" shape, is inserted into the outer container so as to partially project out of the open upper end, and has: a front wall and two side walls opposite one another; and a locking system, which prevents the lid from rotating from the closed position to the open position, can be deactivated through an external action of the user, who allows the lid to rotate from the closed position to the open position, and can be reactivated by rotating the lid from the open position to the closed position; the pack is characterized in that the locking system comprises: a support element, which is arranged in the outer container in contact with the collar between the inner wrap and the collar; two coupling wings, which project outwards and are carried by the support element in a movable manner, so that they can move closer to, or away from one another whereby the collar has two seats, in particular two second through openings or two notches, into which the coupling wings are inserted; and two first through openings, each of which is obtained through a wall (11, 13) of the lid, houses at least a portion of a corresponding coupling wing in order to activate the locking system, and releases the corresponding coupling wing arranged inside it when the user acts upon the coupling wing from the outside in order to deactivate the locking system. a group of smoking articles; an inner wrap, which wraps the group of smoking articles; a rigid outer container, which is cup-shaped, houses the inner wrap and has an open upper end; a lid, which is cup-shaped, is hinged to the outer container along a hinge so as to rotate, relative to the outer container, between an open position and a closed position, and has: an open lower end, an upper wall, a front wall and a rear wall opposite one another, and two side walls opposite one another; a collar, which is folded in a "U" shape, is inserted into the outer container so as to partially project out of the open upper end, and has: a front wall and two side walls opposite one another; and a locking system, which prevents the lid from rotating from the closed position to the open position, can be deactivated through an external action of the user, who allows the lid to rotate from the closed position to the open position, and can be reactivated by rotating the lid from the open position to the closed position; the pack is characterized in that the locking system comprises: a support element, which is arranged in the outer container in contact with the collar between the inner wrap and the collar; two coupling wings, which project outwards and are carried by the support element in a movable manner, so that they can move closer to, or away from one another whereby the collar has two seats, in particular two second through openings or two notches, into which the coupling wings are inserted; and two first through openings, each of which is obtained through a wall (11, 13) of the lid, houses at least a portion of a corresponding coupling wing in order to activate the locking system, and releases the corresponding coupling wing arranged inside it when the user acts upon the coupling wing from the outside in order to deactivate the locking system. a support element, which is arranged in the outer container in contact with the collar between the inner wrap and the collar; two coupling wings, which project outwards and are carried by the support element in a movable manner, so that they can move closer to, or away from one another whereby the collar has two seats, in particular two second through openings or two notches, into which the coupling wings are inserted; and two first through openings, each of which is obtained through a wall (11, 13) of the lid, houses at least a portion of a corresponding coupling wing in order to activate the locking system, and releases the corresponding coupling wing arranged inside it when the user acts upon the coupling wing from the outside in order to deactivate the locking system.