It is an object of the present invention to provide a rotation device in which a cylindrical rotating body is configured to be driven by a plurality of motors and in which a meshing operation of a first motor-side gear and a rotating body-side gear and a meshing operation of a second motor-side gear and a rotating body-side gear can be easily performed so as to increase efficiency of an attaching operation of the motors to the rotating body.A bracket of a rotation device of the present invention has a guide mechanism that is configured to guide a first motor (M1) and a second motor (M2) so as to rotate the same about an axis of a cylindrical rotating body (32) relative to each other. A first gear (113x) and a second gear (123x) can respectively be meshed with rotating body side gears (335a, 335b) corresponding thereto while the first motor (M1) or the second motor (M2) is deviated around the axis of the cylindrical rotating body (32) from a normal attachment position with respect to the bracket. Further, the first motor (M1) or the second motor (M2) can be guided to the normal attachment position by the guide mechanism in the condition.
