An apparatus for inserting a tube made of aluminium internally of a box arranged horizontally, wherein the tube comprises, at an end thereof, a dispensing nozzle closed by a cap and, at a second end, a terminal portion folded to form a tail and wherein the box is movable according to an infeeding direction and having an open end in order to enable insertion therein of a tube, the apparatus comprising: a conveyor means for transport of a tube along a transport direction parallel to the infeeding direction of the tube, the conveyor means having a seat for containing a tube and being activatable to position the tube facing the open end of the box and wherein the tube is arranged in the seat in such a way as to have the end with the cap towards the open end of the box; a pusher element arranged by the flank of the conveyor means, on the opposite side with respect to the box, and movable in alternating translation along a movement direction transversal and perpendicular to the conveyor means; a contact head, borne at an end of the pusher element, for contact with the tail of the tube arranged in the seat of the conveyor means, characterised in that the contact head is conformed and configured in such a way as to have a housing for receiving and housing the tail of the tube and comprising gripping means (22, 23) which are activatable to clamp the tail of the tube and retain the tail of the tube on both sides of the tail, wherein the apparatus is configured in such a way that the pusher element is movable along the movement direction, with respect to the conveyor means, from a retracted position, wherein the contact head is distant from the tail of the tube arranged in the seat of the conveyor means, to a first advanced position, wherein the contact head is placed at the tail of the tube so that the tail of the tube is received in the housing and the gripping means (22, 23) are activated to clamp and retain the tail of the tube, and thus the pusher element, with the gripping means (22, 23) retaining the tail of the tube, is movable up to a second final advanced position to push the tube and insert the tube internally of the box, wherein the gripping means (22, 23) release the tail of the tube and the pusher element can be moved to return into the retracted position. a conveyor means for transport of a tube along a transport direction parallel to the infeeding direction of the tube, the conveyor means having a seat for containing a tube and being activatable to position the tube facing the open end of the box and wherein the tube is arranged in the seat in such a way as to have the end with the cap towards the open end of the box; a pusher element arranged by the flank of the conveyor means, on the opposite side with respect to the box, and movable in alternating translation along a movement direction transversal and perpendicular to the conveyor means; a contact head, borne at an end of the pusher element, for contact with the tail of the tube arranged in the seat of the conveyor means, characterised in that the contact head is conformed and configured in such a way as to have a housing for receiving and housing the tail of the tube and comprising gripping means (22, 23) which are activatable to clamp the tail of the tube and retain the tail of the tube on both sides of the tail, wherein the apparatus is configured in such a way that the pusher element is movable along the movement direction, with respect to the conveyor means, from a retracted position, wherein the contact head is distant from the tail of the tube arranged in the seat of the conveyor means, to a first advanced position, wherein the contact head is placed at the tail of the tube so that the tail of the tube is received in the housing and the gripping means (22, 23) are activated to clamp and retain the tail of the tube, and thus the pusher element, with the gripping means (22, 23) retaining the tail of the tube, is movable up to a second final advanced position to push the tube and insert the tube internally of the box, wherein the gripping means (22, 23) release the tail of the tube and the pusher element can be moved to return into the retracted position.