Patent ID: 7787161

Claim:
An image reading device comprising: a conveying path that has a pair of guide members facing each other at a distance and extending in a conveying direction of an original; an original conveying unit that conveys the original along the conveying path; and an image reading unit that is comprised of a flexible sheet-like substrate on which a plurality of optical sensors are arranged, wherein the sheet-like substrate is inclined with respect to the conveying direction of the original, and fixed to one of the pair of guide members at one end thereof and abuts against the other of the pair of guide members at the other end thereof, wherein said image reading unit reads image data on one side of the original when the original is conveyed along the conveying path and passes through between the other end of the sheet-like substrate and the other of the pair of guide members, and wherein the original displaces the other end the sheet-like substrate and causes the sheet-like substrate to deform when the original passes through between the other end of the sheet-like substrate and the other of the pair of guide members, wherein the other of the pair of guide members has a reference member for obtaining shading data in the portion against which an end of the sheet-like substrate abuts, wherein the portion is an extension of an end portion of the one of the pair of guide members.