An object of the present invention is to provide a simple structure and a structure that can be coped with at a low cost, yet it is possible to avoid the accumulation of straw chips and the like at a location below a delivery point of a grain culm, and, furthermore, it is possible to prevent the accumulation of straw chips below the delivery point. It has been demanded that the operation of replenishing the liquid to the liquid storage tank provided by effectively utilizing the space on the side can be easily performed. An inlet plate (24) for guiding a harvested grain culm conveyed by a reaper conveying unit (3) to a grain culm supply port (23) formed on the front side of a threshing device (4), and an inlet plate (24) located below and above the inlet plate (24). A liquid storage tank 33 having a supply port 37 and a flow-down guide plate 42 extending from the front end of the inlet plate 24 to the front lower side of the supply port 37 through the front of the supply port 37 are provided. A supply opening 40 is formed in a portion located above the supply port 37, and the supply opening 40 is closed by a lid 41 that can be opened and closed. [Selection diagram] FIG.【課題】簡単な構造で且つ低コストで対応できる構造でありながら、穀稈の受渡し箇所の下方側箇所にワラ屑等が堆積することを回避させることが可能であり、しかも、受渡し箇所の下方側の空間を有効利用して設けられる液体貯留タンクに対する液体の補給作業を容易に行えるようにすることが要望されていた。【解決手段】刈取搬送部３により搬送される刈取穀稈を脱穀装置４の前側面に形成された穀稈供給口２３に案内する入口プレート２４と、入口プレート２４の下方に位置するとともに上部に補給口３７を有する液体貯留タンク３３と、入口プレート２４の前端部から補給口３７の前方を通って補給口３７の前下方側箇所まで延びる流下案内板４２とが備えられ、入口プレート２４のうち補給口３７の上方に位置する部分に補給用開口４０が形成され、補給用開口４０が開閉可能な蓋体４１によって閉塞されている。【選択図】図３
