PROBLEM TO BE SOLVED: To provide a desired combine-harvester, in which a rotation sensor hardly receives the influences of vibrations of a hydraulic stepless speed variator.SOLUTION: A combine-harvester comprises: a vertically movable mowing part for mowing and transporting the crop at a farm field to the back of the harvester body; a mowing HST for the mowing part thereby to speed-change the rotation power from an engine and to transmit the power to the mowing part; a mowing input shaft 19 of the airframe transverse direction, which is mounted on the vertical base end part of the mowing part and for receiving the rotation power outputted from the mowing HST; a drive case 43 for supporting the mowing input axis 19; and a rotation sensor 87 for measuring the rotation number of the rotation power outputted from the mowing HST, wherein the rotation sensor 87 is supported by the drive case 43.SELECTED DRAWING: Figure 8