PROBLEM TO BE SOLVED: To provide a reaping portion of a combine harvester, which can reduce vibrations and noises generated from the cutting device and simplify the cutting device and the reaping frame for supporting the device.SOLUTION: The reaping portion of the combined harvester rotatably includes a plurality of disk-shaped cutting blades 231 for cutting the root sides of grain culms in the cutting device 23, the plurality of the cutting blades 231 are arranged on the approximately same straight line in the lateral direction, a transmission mechanism for transmitting a power from an actuator 233 to the cutting blades 231 is disposed downward of the cutting blades 231, a lateral driving shaft 237 included in the transmission mechanism is extended in the lateral direction, a plurality of rotation driving shafts 238 included in the transmission mechanism is extended upward from the lateral driving shaft 237, and the cutting blades 231 are disposed at the tip end of each rotation driving shaft 238.COPYRIGHT: (C)2010,JPO&INPIT【課題】切断装置から発生する振動および騒音を低減し、かつ切断装置およびこれを支持する刈取フレームの簡素化を図ることができる、コンバインの刈取部を提供する。【解決手段】コンバインの刈取部において、切断装置23に、穀稈を株元側で切断する複数の円盤形状の切断刃231を回転駆動可能に備えて、複数の切断刃231を左右方向に略同一直線上に並べて配置し、複数の切断刃231にアクチュエータ233からの動力を伝達する伝動機構をこれらの切断刃231の下方に配置して、前記伝動機構に含まれる横駆動軸237を左右方向へ延設するとともに、前記伝動機構に含まれる複数の回転駆動軸238を横駆動軸237から上方へ延設し、各回転駆動軸238の先端部に切断刃231を設ける。【選択図】図6
