A yarn winding unit comprising: a frame, and a cradle device including a cradle arm adapted to rotatably hold a package around which a spun yarn is wound, a driving section (60, 160) adapted to drive the cradle arm, and a control section (63a, 64a, 68a) adapted to control the driving section (60, 160), the cradle device being a module provided detachably to the frame, wherein the cradle device includes: a supporting section adapted to swingably support the cradle arm and fixed to the frame, and the driving section (60, 160) adapted to swing the cradle arm with respect to the supporting section, characterized in that the driving section includes: a first driving device adapted to swing the cradle arm by moving a prescribed point of application of force of the cradle arm with respect to the supporting section, and a second driving device adapted to swing the cradle arm by moving the point of application of force by moving the first driving device with respect to the supporting section, and a moved amount of the point of application of force by the second driving device is greater than a moved amount of the point of application of force by the first driving device. a frame, and a cradle device including a cradle arm adapted to rotatably hold a package around which a spun yarn is wound, a driving section (60, 160) adapted to drive the cradle arm, and a control section (63a, 64a, 68a) adapted to control the driving section (60, 160), the cradle device being a module provided detachably to the frame, wherein the cradle device includes: a supporting section adapted to swingably support the cradle arm and fixed to the frame, and the driving section (60, 160) adapted to swing the cradle arm with respect to the supporting section, characterized in that the driving section includes: a first driving device adapted to swing the cradle arm by moving a prescribed point of application of force of the cradle arm with respect to the supporting section, and a second driving device adapted to swing the cradle arm by moving the point of application of force by moving the first driving device with respect to the supporting section, and a moved amount of the point of application of force by the second driving device is greater than a moved amount of the point of application of force by the first driving device. a supporting section adapted to swingably support the cradle arm and fixed to the frame, and the driving section (60, 160) adapted to swing the cradle arm with respect to the supporting section, characterized in that the driving section includes: a first driving device adapted to swing the cradle arm by moving a prescribed point of application of force of the cradle arm with respect to the supporting section, and a second driving device adapted to swing the cradle arm by moving the point of application of force by moving the first driving device with respect to the supporting section, and a first driving device adapted to swing the cradle arm by moving a prescribed point of application of force of the cradle arm with respect to the supporting section, and a second driving device adapted to swing the cradle arm by moving the point of application of force by moving the first driving device with respect to the supporting section, and a moved amount of the point of application of force by the second driving device is greater than a moved amount of the point of application of force by the first driving device.