The present invention provides a combined harvester capable of optimizing the speed of feeding grain culms to a threshing device. The combined harvester is configured as the following structure: a hydraulic stepless transmission device (10) is disposed for driving a feeding chain (12B) instead of a driving device (2) and a harvesting device (4)； the front side of the threshing device (3) is configured with a secondary shaft (71) having a transverse machine body； power is transmitted from the output shaft (70) of an engine (62) to the machine body interior part of the secondary shaft (71), and the power is then transmitted from the machine body outer part of the secondary shaft (71) to the input shaft (10A) of the hydraulic stepless transmission device (10). Further, also made is a structure for power transmission from the secondary shaft (71) to the threshing device, and a threshing clutch (90A) is disposed for power transmission connection and disconnection from the output shaft (70) of the engine (62) to the secondary shaft (71).本發明提供一種聯合收割機。使穀物稈向脫粒裝置的供給速度最佳化。該聯合收割機做成如下結構：設置不驅動行駛裝置(2)及收割裝置(4)而是驅動供給鏈(12B)的油壓式無段變速裝置(10)，在脫粒裝置(3)的前側設置機體左右方向的副軸(71)，從發動機(62)的輸出軸(70)向副軸(71)的機體內側部傳遞動力，從該副軸(71)的機體外側部向上述油壓式無段變速裝置(10)的輸入軸(10A)傳遞動力。另外，做成從副軸(71)向脫粒裝置(3)傳遞動力的結構，設置將從發動機(62)的輸出軸(70)向副軸(71)的動力的傳遞連接及斷開的脫粒離合器(90A)。
