Automatic machine of introduction of polyethylene bag (liner) into a raffia bag, comprising a car (1) for movement of the system, and such car contains a movement system in the "Y" coordinate through a rack (2) and the liner bag (3) enters directly in the liner table (4) which is positioned below two multi-pierced stainless steel tubes (5) and responsible for establishing the vacuum that holds the liner bag (3), allowing its automatic insertion in the raffia bag (6). In the same direction of the liner table (4) there is the suction table (7) where the raffia bag reaches (6) shifting in the coordinate "X", and the raffia bag (6) is held to the suction table (7) through a multiplicity of holes (8) similar to the holes of the multi-pierced tubes (5).