Paper transporting device, image forming apparatus, image reading device and post-processing device

A paper transporting device comprising:

• a driving roller member that is rotated;
• a driven roller member that is rotated in contact with the driving roller member;
• a first guiding member that is disposed on a driving roller member side and that guides a paper to a contact portion in which the driving roller member and the driven roller member are in contact with each other;
• and
• a second guiding member (i) that is disposed on a driven roller member side, (ii) that guides the paper to the contact portion, and (iii) that partially protrudes radially inward from an outer peripheral surface of the driving roller member at a more downstream side than the contact portion, in a paper transporting direction, and at the contact portion,
• the second guiding member extends at least from the contact portion to a position located at a downstream side of the contact portion,
• wherein the second guiding member is configured to curve the paper, discharged from the contact portion, inward in the radial direction over the outer peripheral surface of the driving roller while passing through the contact portion and immediately after passing through the contact portion,
• wherein the second guiding member has a convex member having a convex shape,
• wherein the convex shape of the convex member is positioned at the contact portion such that a first portion of the convex member is disposed upstream from the contact portion and a second portion of the convex member is disposed downstream from the contact portion
• wherein the second portion of the convex shape of the convex member which protrudes radially inward from an outer peripheral surface of the driving roller member is longer in the paper transporting direction than the first portion of the convex shape of the convex member which protrudes radially inward from an outer peripheral surface of the driving roller member.