Abstract: A yoke unit connects two shaft arranged at a predetermined angle. The yoke unit has a pair of yoke portions receiving an input shaft, a clamp for clamping the input shaft, a bush disposed around the clamp, and an insert inserted into a space between the yoke portions and coupled to the bush. When the shaft is received in the yoke portions, the bush is inserted into through holes of the yoke portions such that the bush is positioned on a recess of the input shaft. The clamp passes through the bush and is screwed to any one of through holes of the yoke portions. The bush prevents the input shaft from moving an axial direction. The insert prevents the yoke portions from deforming when the clamp is fastened and when an external impact is applied to the yoke portions. A friction between the yoke unit and the input shaft can be reduced by the bush and the abrasion of the bolt and the shaft can be reduced.