The present invention provides a structure for storing coreless roll paper R having a hollow portion in the axis portion instead of a winding core, wherein the structure includes an outer case 2 for storing roll paper R; and a lower holding member 3 and an upper holding member 4 respectively having concave portions 31,41 each having an inside diameter that closely matches the outside diameter of the roll paper R, each of the lower holding member 3 and the upper holding member 4 having an external shape that fits the outer case 2, wherein the lower holding member 3 is disposed in the outer case 2 with the concave portion 31 facing upward, and the upper holding member 4 is disposed in the outer case 2 at the location above the lower holding member 3 with its concave portion 41 facing downward.