An automatic banding packing machine is provided with a packing machine body having an upper-face table on which the object to be packed passes, a pair of vertical band guide arches arranged separately from each other above the upper-face table in a direction parallel with a passage direction of the object to be packed, and a horizontal band guide arch arranged above the upper-face table in the direction parallel with the passage direction of the object to be packed, and the pair of vertical band guide arches is configured to be movable between a standby position separated from the horizontal band guide arch and a communication position communicating with the horizontal band guide arch in a direction orthogonal to the passage direction of the object to be packed.