PROBLEM TO BE SOLVED: To provide an operation apparatus of combine harvester with which during traveling, a reaping part and a threshing apparatus are not driven even if a clutch operation means is operated by mistake.SOLUTION: The operation apparatus of combine harvester is equipped with a manipulatable clutch operation means 25 for changing operation of a reaping clutch 17 and a threshing clutch 14 and a manipulatable speed change operation tool 24 for operating speed change of a traveling transmission 13. The operation apparatus of combine harvester is equipped with a clutch checking means 45 which is changeable from an action state in which change of engagement state of the reaping clutch 17 and the threshing clutch 14 by the clutch operation means 25 is checked to an action release state in which change of engagement state of the reaping clutch 17 and the threshing clutch 14 by the clutch operation means 25 is allowed. When the traveling transmission 13 is operated to a low-speed side, the clutch checking means 45 is in an action released state and when the traveling transmission 13 is operated to a high-speed side, the traveling transmission 13 and the clutch checking means 45 are connected so as to make the clutch checking means 45 in an action state.COPYRIGHT: (C)2009,JPO&INPIT【課題】 移動走行の際、クラッチ操作手段を誤操作されることがあっても、刈取り部と脱穀装置とが駆動されないようにする。【解決手段】 刈取りクラッチ17と脱穀クラッチ14とを切り換え操作する人為操作自在なクラッチ操作手段25と、走行変速装置13を変速操作する人為操作自在な変速操作具24とを備えている。クラッチ操作手段25による刈取りクラッチ17と脱穀クラッチ14との入り状態への切り換えを牽制する作用状態と、クラッチ操作手段25による刈取りクラッチ17と脱穀クラッチ14との入り状態への切り換えを許容する作用解除状態とに切り換え自在なクラッチ牽制手段45を備えている。走行変速装置13が低速側に操作されると、クラッチ牽制手段45が作用解除状態になり、走行変速装置13が高速側に操作されると、クラッチ牽制手段45が作用状態になるよう走行変速装置13とクラッチ牽制手段45とを連係させてある。【選択図】 図4
