PROBLEM TO BE SOLVED: To provide a combine-harvester capable of releasing clogging efficiently by little movement when clogging occurs in a grain culm conveyance apparatus of a pretreatment part.SOLUTION: A support member for guiding and supporting a back face on a grain culm conveyance side of a right conveyance chain 32B is configured movably. End side rollers 101 and 102 of a left conveyance chain 32A are configured movably. When clogging occurs, an operator reduces clogging pressure in the right conveyance chain 32B by moving the support member, and also loosens the left conveyance chain 32A and spaces an interval of a confluent part by moving the end side rollers 101 and 102.SELECTED DRAWING: Figure 12COPYRIGHT: (C)2016,JPO&INPIT【課題】前処理部の穀稈搬送装置に詰りが生じた場合、該詰りを少ない移動により効率よく解除することができるコンバインを提供する。【解決手段】右搬送チェン32Bの穀稈搬送側の背面を案内、支持する支持部材を移動自在に構成する。左搬送チェン32Aの終端側ローラ101,102を移動自在に構成する。詰りが生じた場合、オペレータが上記支持部材を移動操作して、右搬送チェン32Bの詰り圧力を減少し、また終端側ローラ101,102を移動操作して、左搬送チェン32Aを弛ませて、合流部の間隔をあける。【選択図】図12