The image reading device includes a first document member, a white reference plate, an image sensor, a conveying section, and a control section. A first document is placed on the first document member. The image sensor reads the first document placed on the first document member. The conveying section conveys the image sensor in a first direction and a second direction opposite to the first direction. The image sensor reads the first document while being moved in the first direction. The control section executes a first control. The first control executes a process to control the image sensor to read the white reference plate, to control the conveying section to move the image sensor in the second direction, to control the conveying section to start moving the image sensor in the first direction, and to control the image sensor to read the first document, in this order.