Patent ID: 8520269

Claim:
An image reading apparatus comprising: an optical system carriage that scans an original placed on a platen back and forth; a driving unit including a belt that moves the optical system carriage in a scanning direction, a pair of pulleys around which the belt is stretched, a pin that rotatably supports a first pulley, which is a driving pulley, of the pair of pulleys, and a driving motor that rotationally drives the driving pulley; a mount for fixing the pin; a housing that houses the optical system carriage and the driving unit; at least two first fastening parts for fastening and fixing the mount to the housing, respectively including first bosses that extend vertically from a bottom portion of the housing and first fastening members that are inserted into the first bosses via the mount to fix the mount to the housing; and a second fastening part for fastening and fixing the mount to the housing that is spaced apart from, and disposed on an opposite side to, the first fastening parts with respect to the pin in the scanning direction, including a second boss that extends vertically from the bottom portion of the housing and has a different height from the first bosses and a second fastening member that is inserted into the second boss via the mount to fix the mount to the housing.