Shuffled playing cards that are used in various kinds of card games are usually configured from 416 cards if using eight-deck cards. But being bulky, there is the problem that when the dealer tries to set the playing cards in a card shooter, etc. all at once, the cards scatter and cannot easily be placed therein. The purpose of the present invention is to provide a packing box for playing cards that a game leader can easily set in a card shooter, etc. prior to a game. When assembled, the packing box (2) for shuffled playing cards (1) has a three-dimensional shape with six surfaces, a front surface (3), a back surface (4), a left side surface (5), a right side surface (6), an upper surface (7), and a lower surface (8), so as to wrap the entire perimeter of the shuffled playing cards (1). The packing box (2) is provided with: zippers (11) at two places separated by a specified interval, the zippers being provided with zipper-shaped cutting lines (10) that run parallel to the longitudinal direction (arrow (L)) of the three-dimensional shape; and a central band (12) in the central area demarcated by the zippers (11) in the two places. The packing box is configured so that by removing the two zippers (11) along the cutting lines (10) obtained from the zipper lines and a linear slit (13), the left and right side surfaces (5, 6) of the packing box (2) can each be removed to expose the two side surfaces of the shuffled playing cards (1).