Abstract: Automatic packaging machine having a dispenser for pre-shaped and planar boxes, connected to suckers actuated by vacuum cylinders taking the planar boxes and putting them into the first division of a feeder rack, the closure of the box lugs being attained by means of small and rotatory pneumatic cylinders and of fixed guides. The machine of the invention, being of small size, operates with reduced power and reduces excessive noise and high operation, cleaning, lubrication and maintenance costs.