PROBLEM TO BE SOLVED: To provide a combine transmission structure in which power transmission to a threshing device and a reaping device can be performed while preventing the concentration of a transmission load to a long shaft.SOLUTION: A rotational power is operatively transmitted to one side in a machine body width direction of a first countershaft from an output shaft of an engine mounted on a front part of a traveling machine body and on one side of the machine body width direction, through a pipe shaft supported to one side of the machine body width direction of a winnower shaft in a relative rotating manner. The rotational power is operatively transmitted from the first countershaft to one side in the machine body width direction of the second countershaft and to a threshing cylinder shaft, respectively. The rotational power is operatively transmitted from the other side in the machine body width direction of the second countershaft to the other side in the machine body width direction of the winnower shaft.SELECTED DRAWING: Figure 4