A machine for packaging articles comprising: - a fixed frame; - means for feeding a film to a packaging station, where the film is used to wrap the articles, - a conveyor line by which the articles are directed to the packaging station; - a sealing unit, located in the packaging station, movable relative to the fixed frame and also comprising at least two sealing elements (3A,3B) movable relative to each other between a spaced-apart position and a close-together position where the two sealing elements (3A,3B) cooperate to seal the film interposed between them; - first movement means for moving the sealing unit and comprising a first motor mounted on the fixed frame; - second movement means for moving the sealing unit, comprising a second motor mounted on the fixed frame and operatively coupled to at least one of the two sealing elements (3A,3B) to move them between a spaced apart position and a close-together position where they act in conjunction to seal the film, - the first and the second movement means (4,6) comprise at least one articulated arm (BA,BB), respectively, and in that it comprises a control unit operatively connected to the first motor and to the second motor in order to drive them in proper relationship so as to move the two sealing elements (3A,3B) relative to each other and relative to the frame according to a predetermined law of motion, wherein the first motor is fixed to the fixed frame and the second motor is fixed to the fixed frame; wherein the sealing unit comprises a movable frame which is movable, relative to the fixed frame, along a feed direction of the articles and which carries the two sealing elements (3A,3B); wherein the second movement means comprises at least one articulated arm which comprises a first member and a second member which are movable relative to each other, the first member being connected to the second motor to be carried in rotation and the second member being kinematically connected to at least one of the two sealing elements (3A, 3B); wherein the second movement means further comprise a rocker connected to the second member of the second articulated arm of the second movement means so as to be moved in rotation relative to the movable frame, the rocker being coupled to at least one of the sealing elements (3A,3B) in order to move the sealing elements (3A,3B) from the spaced-apart position to the close-together position and vice versa, wherein the second movement means comprise a first rod which is operatively coupled to the first sealing element and to the rocker to move the first sealing element when the rocker is carried in rotation, and a second rod which is operatively coupled to the second sealing element and to the rocker to move the second sealing element when the rocker is carried in rotation; characterised in that the rocker is rotatable mounted on the movable frame and the second movement means comprises a guide associated to the movable frame to guide the movement of the first and second sealing element relative to each other. - a fixed frame; - means for feeding a film to a packaging station, where the film is used to wrap the articles, - a conveyor line by which the articles are directed to the packaging station; - a sealing unit, located in the packaging station, movable relative to the fixed frame and also comprising at least two sealing elements (3A,3B) movable relative to each other between a spaced-apart position and a close-together position where the two sealing elements (3A,3B) cooperate to seal the film interposed between them; - first movement means for moving the sealing unit and comprising a first motor mounted on the fixed frame; - second movement means for moving the sealing unit, comprising a second motor mounted on the fixed frame and operatively coupled to at least one of the two sealing elements (3A,3B) to move them between a spaced apart position and a close-together position where they act in conjunction to seal the film, - the first and the second movement means (4,6) comprise at least one articulated arm (BA,BB), respectively, and in that it comprises a control unit operatively connected to the first motor and to the second motor in order to drive them in proper relationship so as to move the two sealing elements (3A,3B) relative to each other and relative to the frame according to a predetermined law of motion, wherein