Abstract: A box-packing apparatus that reduces inefficiency attributable to the box-replacement process includes a first conveyance unit and a second conveyance unit. The first conveyance unit conveys articles. The second conveyance unit conveys the articles transferred from the first conveyance unit and feeds them into a box waiting downstream. When the second conveyance unit feeds a predetermined number of the articles into the box, the second conveyance unit retains the articles transferred from the first conveyance unit without feeding them into the box. Furthermore, in the box packing apparatus, the second conveyance unit may perform a back-feed operation when it retains the articles transferred from the first conveyance unit.