To box a plurality of assembled standing pouches 4 while keeping an alignment state.

A caser includes raising/lowering means 40 raising/lowering a stack part 12 composed of a plurality of article placement plates 12a, 12b, 12c and 12d up-down arranged at the same interval, and expanding/contracting means 42 and 44 expanding/contracting the interval between the placement plates. The pouch 4 is supplied by a bucket pusher 10 with the interval expanded, and the pouch 4 is pushed out by a stack pusher 14 with the interval contracted and is accommodated in the bucket 16. The bucket 16 is rotated horizontally by 180 degrees to face the opening of the case 2. The case 2 is moved and is put on the outside of the bucket 16. After the bucket 16 and the case 2 are rotated in the vertical direction as they are to make the opening of the case 2 stand upward, the case 2 is lowered. The pouch 4 in the bucket 16 is inserted in the case 2.