Image reading device and image forming apparatus incorporating same

An image forming apparatus comprising an image reading device,

• the image reading device including
• a contact glass,
• an image sensor to read image data from a document through the contact glass, the image sensor including plural reading elements arranged on an identical line along a main scanning direction,
• a holder to hold the image sensor,
• a mount to mount the holder, the mount including a screw hole and the holder being movable toward and away from the contact glass,
• a biasing member to bias the holder toward the contact glass, and
• an adjusting screw, attached to the screw hole, to adjust a position of the holder relative to the contact glass against a biasing force of the biasing member by advancing and retreating in an axial direction of the screw hole, the biasing member and the adjusting screw being arranged on an identical straight line along the main scanning direction, wherein
• the holder includes an upper holder to hold an upper side of the image sensor and a lower holder to hold a lower side of the image sensor,
• each of the upper holder and the lower holder includes a shaft inserted into an insertion portion of the mount in a state in which each of the upper holder and the lower holder is movable toward and away from the contact glass, and
• the insertion portion and the screw hole are arranged on an identical straight line along the main scanning direction.