PROBLEM TO BE SOLVED: To provide a combine harvester improved in visibility inside a grain tank from an operation part.SOLUTION: The combine harvester is structured as follows: a planar upper inclined surface 24 tilting backward is formed on the upper part of a front side wall 21 of a grain tank 7 a transparent member 25 allowing light to get into the grain tank 7 is mounted on the upper inclined surface 24 the front side part of a ceiling member 22 of the grain tank 7 is connected to the upper end of the upper inclined surface 24 an openable inspection lid 28 is set to the front part of the ceiling member 22 and the inspection lid 28 is arranged on a portion located right behind the transparent member 25. An operator of the operation part 4 visibly recognizes the inside of the grain tank 7 brightened by light seeped through the transparent member 25.COPYRIGHT: (C)2015,JPO&INPIT【課題】操縦部からのグレンタンク内部の視認性を向上させる。【解決手段】コンバインにおいて、グレンタンク(7)の前側壁(21)の上部には、後上がり傾斜する平面状の上部傾斜面(24)が形成され、上部傾斜面(24)にはグレンタンク(7)内に光を差し込ませうる透明部材(25)が設けられ、上部傾斜面(24)の上端にはグレンタンク(7)の天井部材(22)の前側部分が接続され、天井部材(22)の前部に開閉自在な点検蓋(28)が設けられて、透明部材(25)の直後方に位置する部位に点検蓋(28)が配置される構成とし、操縦部(4)の作業者が、該透明部材(25)から差し込む光によって明るくなったグレンタンク(7)内を視認する構成とする。【選択図】図2