Abstract: A packaging box for a roll-shaped material wound around a cylindrical core, including a prism-shaped case body, and respective side surface portions at both ends in a longitudinal direction of the prism-shaped case body, the prism-shaped case body and the side surface portions being formed of a single sheet member, that includes a holding unit inserted into the cylindrical core of the roll-shaped material to hold the roll-shaped material within the prism-shaped case body, wherein, when the holding unit 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 in which the prism-shaped case body extends, is formed with a recessed portion that is recessed in the cross direction.

Abstract: A packaging box for a roll-shaped material wound around a cylindrical core, including a cylindrical case body, and respective side surface portions at both ends in a longitudinal direction of the cylindrical case body, the cylindrical case body and the side surface portions being formed of a single sheet member, that includes a holding unit inserted into the cylindrical core of the roll-shaped material to hold the roll-shaped material within the cylindrical case body, wherein, when the holding unit 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 in which the cylindrical case body extends, is formed with a recessed portion that is recessed in the cross direction.