A drive-force-distribution control device includes an input-side bevel gear and an output-side bevel gear, a center shaft, left and right clutches, a housing, a bearing and a shim member. The output-side bevel gear is supported on the center shaft such that the output-side bevel gear meshes with the input-side bevel gear. The housing can be divided in the radial direction of the output-side bevel gear. The bearing is disposed at one end of the center shaft. The shim member is inserted in an axial-direction gap between the housing and the bearing. The output-side bevel gear and the center shaft can be attached to the housing from the radial direction. The axial end of the center shaft is located towards the other end with respect to the axial end of the bearing.