To simplify assembling of an auger and to raise the rigidity of a reaping part.

An auger structure of a combine harvester is composed as follows. An auger drum 20 in which lid plates 24 and 25 are fixed to both ends is freely rotatably and axially supported over side plates 11 and 12 stood and arranged at both right and left ends of a transportation deck. A fixed supporting shaft 35 rotatably passed through the center of the one lid plate 24 is connected and fixed to the one side plate 11. A rotating supporting shaft connected and fixed to the center of the other lid plate is freely rotatably passed through and supported with the other side plate and an eccentric supporting shaft 44 is connected and supported through a supporting bracket 41 at the inner ends of the drum of the fixed supporting shaft 35. The base end of a rake-in body 22 passed through and mounted from the outer periphery on the auger drum 20 is pivoted on the eccentric supporting shaft 44 so as to make the rake-in body 22 perform emerging and retreating operation from the auger drum 20 by rotation of the auger drum 20. In the auger structure of the combine harvester, an assembling hole 24a in the form so as to pass the eccentric supporting shaft 44 and the supporting bracket 41 is opened in the one lid plate 24 of the auger drum 20.

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