Packaging box for roll-shaped material

A packaging material for a roll-shaped material wound around a cylindrical core, comprising:

• a packaging box includes a prism-shaped case body and respective side surface portions at both ends in a longitudinal direction of the prism-shaped case body, and
• a holding unit configured to hold the roll-shaped material within the package box, wherein;
• the holding unit is formed as a different body from the packaging box,
• the holding unit includes an insertion portion configured to be inserted into the cylindrical core at an end portion of the cylindrical core and a flange portion configured to be in contact with the cylindrical core from an outside in a longitudinal direction,
• the insertion portion comprises a recess portion disposed next to the flange portion that is connected thereto,
• when the insertion portion is inserted into the cylindrical core of the roll-shaped material, a region facing an end portion of the cylindrical core in a cross direction intersecting the longitudinal direction, is formed with a recessed portion that is recessed in the cross direction to suppress rubbing between an end portion of the cylindrical core and the holding unit.

A packaging box for a roll-shaped material wound around a cylindrical core, including a prism-shaped case body, and a plurality of side surface portions at both ends in a longitudinal direction of the prism-shaped case body, the prism-shaped case body and each side surface portion being formed of a single sheet member, the packaging box for the roll-shaped material, comprising:

• a holding unit configured to be inserted into the cylindrical core of the roll-shaped material to hold the roll-shaped material within the prism-shaped case body, wherein:
• the holding unit comprises a first pair of holding unit portions and a second pair of holding unit portions,
• the first pair of holding unit portions are two opposing holding unit portions, and are connected to one of the plurality of side surface portions,
• the second pair of holding unit portions are two opposing holding unit portions, and are connected to one of the plurality of side surface portions,
• the holding unit is formed by folding the first pair of holding unit portions and the second pair of holding unit portions,
• each of the two opposing holding unit portions of the first pair of holding unit portions and each of the two opposing holding unit portions of the second pair of holding unit portions comprises a recess portion disposed next to the side surface portion that is connected thereto.