Patent ID: 8654406

Claim:
An image reading apparatus which reads an image on a target, the image reading apparatus comprising: a first housing; a transparent member which is provided on the first housing and has a placement face on which the target is placed; a positioning member which positions the transparent member; a second housing which is assembled on the first housing and biases the positioning member; and an engagement member which is provided on the second housing and engages with the positioning member, wherein when the second housing is assembled on the first housing, the engagement member biases the positioning member so as to fix the transparent member to an attachment position, and wherein the positioning member biases the transparent member with a first biasing force before the second housing is assembled on the first housing, and the positioning member biases the transparent member with a second biasing force which is larger than the first biasing force by a displacement when the positioning member engages with the engagement member after the second housing has been assembled on the first housing.