To charge an article into a continuously conveyed container by means of carriage picking and to improve efficiency.

A concentration shelf 3 provided with multiple concentration sections 20 is arranged, and articles picked by means of carriage picking are inserted into the concentration sections 20, and then, shelf picking is carried out, and as a result, articles to be charged into respective containers are concentrated in the concentration sections 20. Subsequently, the articles are charged into the container from the concentration section 20 in which concentration of the articles is finished.