To provide an image carrier driving device by which a high-quality image is obtained by reducing the density irregularity of an output image and the deviation of image position.

This image carrier driving device is used for a tandem type image forming device. The device is equipped with a plurality of image carriers 11, a 1st frictional wheel 21 coupled with the output shaft 12 of each image carrier 11, a 2nd frictional wheel 22 disposed between the adjacent wheels 21 and coming into contact with the outer peripheral surface of the wheel 21, and a wound and laid transmission element 13 transmitting motive power from a driving shaft 16 to the wheel 22.