To carry a box body while preventing the fall-off of a storage object with a surface for taking in an out the storage object as the lower side without sealing a flap of its surface.

This carrying device of the box body 200 having a pair of right and left freely openable/closable flaps 201 on a bottom surface includes a holding unit 10 for holding the box body 200 and a holding unit moving means. The holding unit 10 has a lifting means 11 for holding the box body 200 at an upper surface or a side surface of the box body 200 and lifting the box body 200, a pair of abutting members 14 for regulating openings of the flaps 201 by abutting on the pair of respective flaps 201, and an abutting member opening/closing operation means 12 for moving the pair of abutting members between an opening regulating position for regulating the openings of the flaps 201 when the pair of abutting members 14 mutually approach under the box body and an opening allowable position for allowing the openings of the flaps when the pair of abutting members separate form each other under the box body.