Image reading apparatus and image forming apparatus

An image reading apparatus comprising:

• a casing including an opening portion;
• a transparent plate mounted to the casing;
• a moving unit accommodated in an accommodating space formed by the casing and the transparent plate and configured to move in a sub-scanning direction to read an image on or adjacent to the transparent plate by performing a scan in a main scanning direction;
• a cable including a first terminal portion connected to the moving unit and a second terminal portion connected to a board arranged outside the accommodating space, the cable being arranged to pass through the opening portion;
• a guide member mounted to the casing and configured to guide the cable that deforms in an interior of the accommodating space with movement of the moving unit;
• and
• a securing member, wherein:
• the cable is secured to the securing member between the first terminal portion and the second terminal portion, and
• the securing member is mounted to the casing in the interior of the accommodating space at a distance from the opening portion that is shorter than a distance between the guide member and the opening portion.