Abstract: The packaging box in the disclosure, which is a packaging box for packaging an object, includes a tubular box body having a first opening in an upper surface thereof, and a lid body detachably attached to the first opening to cover the first opening. The box body has a first turned-back section that is provided in at least one part of a peripheral edge of the first opening and turned back so as to be overlapped with an inner surface of the box body. The lid body has an insertion section that is provided in at least one part of a peripheral edge of the lid body and is to be inserted between the first turned-back section and the inner surface of the box body when the lid body is attached to the first opening.