Paper feeding roller and paper feeding device

A paper feeding roller, comprising:

• a shaft body;
• and
• an elastic body layer formed on an outer circumference of the shaft body,
• wherein the paper feeding roller is comprised in a paper feeding device and is a paper feeding roller rotating with a rotation axis as a center,
• the paper feeding roller has a cantilever support structure in which the shaft body is supported at an end by the paper feeding device,
• the elastic body layer comprises, at two ends along the rotation axis, a supported end as an end at which the shaft body is supported by the paper feeding device, and a free end as an end at which the shaft body is not supported by the paper feeding device,
• in the elastic body layer, an outer diameter of a cross section orthogonal to the rotation axis is greater at the free end than at the supported end, and
• a widened bottom part in which an outer diameter expands linearly or in an inwardly convex manner along the rotation axis toward the free end is provided in a region comprising the free end,
• wherein the widened bottom part is formed by comprising at least a region from a center position between the supported end and the free end to the free end along the rotation axis,
• wherein the elastic body layer has a straight cylindrical part continuous with the widened bottom part on a side of the supported end with respect to the widened bottom part along the rotation axis, wherein an outer diameter change of the straight cylindrical part along the rotation axis is smaller than that of the widened bottom part.