The present invention provides a combine. The invention provides the combine which smoothes the transferring of reaped grain stems for improving the efficiency and precision of threshing operation and can easily perform the maintenance of a driving mechanism of a grain stem conveying system. An adopted structure is characterized in that: a front supplying conveying device (13) is provided at the inside part of a body which supplies the grain stems to a conveying starting end of a grain stem supplying conveying device (12) of a threshing device (2)； the output rotation of a reaping conveying stepless speed change device (21) which increases and reduces the output rotation speed synchronously with the running driving speed of a running device (3) is transmitted to a reaping device (4) and the front supplying conveying device (13). The reaping conveying stepless speed change device (21) is equipped to the inner part of the body of a gearbox (50). The gearbox (50) causes the output rotation of an engine (22) to separately transmit to the grain stem supplying conveying device (12) and the reaping conveying stepless speed change device (21).使收割穀桿之轉交圓滑化以提高脫穀作業之效率與精度，並使穀桿搬送系統之驅動機構之維護容易進行。；於對脫穀裝置(2)供給穀桿之穀桿供給搬送裝置(12)之搬送始端部之機體內側部位設置前側供給搬送裝置(13)，將輸出轉速同步於行進裝置(3)之行進驅動速度增減之收割搬送用無段變速裝置(21)之輸出旋轉傳動至收割裝置(4)與前側供給搬送裝置(13)，將該收割搬送用無段變速裝置(21)安裝於將前述引擎(22)之輸出旋轉分歧傳動至穀桿供給搬送裝置(12)與收割搬送用無段變速裝置(21)之齒輪箱(50)之機體內側部位。
