A transfer device for transferring an object to be transferred in a predetermined
direction has a drive mechanism unit, a transfer direction displacement information
acquiring unit, a skew direction displacement information acquiring unit, and a
transfer processing unit. The drive mechanism unit also has roll parts which cause
the object to be transferred to move in the direction with a rotational force.
The transfer direction displacement information acquiring unit and the skew direction
displacement information acquiring unit radiate a predetermined measuring wave
toward the object, so that the units acquire the displacement information in each
of the directions. Based on the displacement information, the transfer processing
unit performs a predetermined processing.