An image reading device includes a turning unit and a reading unit having a reader. The reader reads an image on a sheet. The turning unit can turn with respect to the reading unit. The turning unit includes a communication unit and a storage portion. The communication unit receives data from outside the image reading device by wirelessly communication and includes a communication main unit detachably mounted within the turning unit and a communication cable that transfers data received by the communication main unit. The storage portion stores the communication cable.