To provide a method for supplying a film in a packaging apparatus wherein respective overlapped packing films can be fed to the packaging apparatus without shifting in widthwise and lengthwise directions from each other.

The method for supplying a film in a packaging apparatus for automatically making bags, filling and packaging comprises steps of overlapping a plurality of packaging films wound around a plurality of drums, adhering them at a partial sealed part 21 by a welding device 20 placed between an apparatus body 5 and the drums and then supplying them to the apparatus body 5.