Image reading device and image forming apparatus

An image reading device comprising:

• an image pickup device;
• a plate-like transparent member on which a document is placed;
• a traveling body including a light source to emit light,
• a housing to accommodate the image pickup device and the traveling body therein,
• the housing including
• a base member including a rectangular bottom surface and a side surface vertically rising from the bottom surface and having an L-shaped member formed by the bottom surface and the side surface,
• a rail member including a rail surface parallel to the bottom surface on which at least the traveling body travels and a first vertical surface vertically falling from a side of one end of the rail surface and having an L-shaped member formed by the rail surface and the first vertical surface,
• the rail member fixed to the side surface of the base member and the bottom surface of the base member to form a square pipe shape by the L-shaped member of the base member and the L-shaped member of the rail member,
• wherein the rail member further includes a fixing part to be fixed to the bottom surface of the base member,
• wherein the fixing part is a surface bent horizontally from the first vertical surface and extends from one end of the rail member in the sub scanning direction to the other end.