A hopper for smoking articles comprising: an inlet portion for the inlet of smoking articles into the hopper; at least an output mouth comprising a plurality of ducts, each duct having an inlet and an outlet, for allowing the exit of the smoking articles from the hopper; a connection portion, connecting the inlet portion with the ducts of the output mouth and comprising two lateral walls opposed each other, against which the smoking articles abut and along which the smoking articles flow falls in an output direction toward the output mouth; a plurality of agitating elements, positioned at the inlet of the ducts of the output mouth, which receives on them, by gravity, the smoking articles flow; each agitating element being movable with respect to one of its axes for facilitating the smoking articles fall from the connecting portion toward the outlets of the ducts; and at least an unloading element, disposed at the connection portion between the two lateral walls, upstream with respect to the agitating elements in the output direction; the unloading element being shaped in such a way to receive the smoking articles flow during their fall in the output direction, and unloading the plurality of agitating elements from the weight of the smoking articles flow; wherein the connection portion comprises a first part and a second part, adjacent to the first part and downstream with respect to the first part in the output direction; and wherein the cross section of the first part is smaller than the cross section of the second part, in such a way to define at least a channel having a cross section widening in the output direction; the hopper is characterized in that the dimension of the cross section of the first part of the connection portion is equal to a multiple of the dimension of the cross section of a smoking article, increased by a space that is smaller than half the dimension of the cross section of a smoking article. an inlet portion for the inlet of smoking articles into the hopper; at least an output mouth comprising a plurality of ducts, each duct having an inlet and an outlet, for allowing the exit of the smoking articles from the hopper; a connection portion, connecting the inlet portion with the ducts of the output mouth and comprising two lateral walls opposed each other, against which the smoking articles abut and along which the smoking articles flow falls in an output direction toward the output mouth; a plurality of agitating elements, positioned at the inlet of the ducts of the output mouth, which receives on them, by gravity, the smoking articles flow; each agitating element being movable with respect to one of its axes for facilitating the smoking articles fall from the connecting portion toward the outlets of the ducts; and at least an unloading element, disposed at the connection portion between the two lateral walls, upstream with respect to the agitating elements in the output direction; the unloading element being shaped in such a way to receive the smoking articles flow during their fall in the output direction, and unloading the plurality of agitating elements from the weight of the smoking articles flow; wherein the connection portion comprises a first part and a second part, adjacent to the first part and downstream with respect to the first part in the output direction; and wherein the cross section of the first part is smaller than the cross section of the second part, in such a way to define at least a channel having a cross section widening in the output direction; the hopper is characterized in that the dimension of the cross section of the first part of the connection portion is equal to a multiple of the dimension of the cross section of a smoking article, increased by a space that is smaller than half the dimension of the cross section of a smoking article.