PROBLEM TO BE SOLVED: To increase the volume of the grain tank of a combine harvester.SOLUTION: This grain tank of the combine harvester is characterized by disposing the grain tank (4) in the rear right side portion of a travel vehicle body (1), disposing a threshing portion (5) in the rear left side portion, vertically disposing a grain-elevating auger cylinder (7) for discharging grains at a place close to the rear central-side of the grain tank (4), and forming a rear side expanded portion (4a) obtained by backward expanding the right side rear side portion of the grain tank (4) to cover a place close to the right side of the grain-elevating auger cylinder (7) with the rear side expanded portion (4a) of the grain tank (4) on the side view.COPYRIGHT: (C)2007,JPO&INPIT【課題】コンバインのグレンタンクの容量をアップする。【解決手段】走行車体(1)の後部右側部にグレンタンク(4)を、後部左側部に脱穀部5を配設し、グレンタンク(4)の後部中央寄り後方近傍に穀粒排出用の揚穀オーガ筒(7)を立設する。グレンタンク(4)の右側後側部を後方に向けて膨出する後側膨出部(4a)に構成し、側面視で揚穀オーガ筒(7)の右側寄り近傍をグレンタンク(4)の後側膨出部(4a)で覆うように構成する。【選択図】図5