PROBLEM TO BE SOLVED: To prevent reduction in a budding rate and seedling establishment rate due to burying of a seed and seedling falling due to planting failure by obtaining an effective chemical effect while reducing a chemical feeding amount.SOLUTION: The paddy field work machine includes a main work device, a fertilization device, and a chemical feed device for seeding or seedling planting, the devices operated in forward travel for working. The main work device includes plural main feed parts 26 feeding a seed or seedling to a field and aligned and disposed in a right/left direction at a fixed interval. The fertilization device includes plural fertilizer feed parts 31 feeding a fertilizer to the field and disposed and spaced apart from the corresponding main feed parts 26 at a predetermined interval in a machine body lateral width direction. The chemical feed device includes plural chemical feed parts 36 configured in a groove formation type so that a groove is formed on a mud face of the field by a groove formation tool 37 for chemical feed and a chemical is fed into the groove and disposed at the same positions as the corresponding main feed parts 26 in the machine body lateral width direction.SELECTED DRAWING: Figure 8【課題】施薬量を削減しながら薬効を効果的に得られるようにした上で、種子の埋没による出芽率や苗立ち率の低下、あるいは、植え付け不良による苗倒れなどを防止する。【解決手段】作業用の前進走行時に作動する播種用又は苗植え付け用の主作業装置と施肥装置と施薬装置とを備え、主作業装置は、種子又は苗を圃場に供給する複数の主供給部26を左右方向に一定間隔をあけて整列配備し、施肥装置は、肥料を圃場に供給する複数の肥料供給部31を、対応する主供給部26から機体横幅方向に所定間隔をあけた位置に配備し、施薬装置は、施薬用の作溝器37により圃場の泥面に作溝して溝内に薬剤を供給する作溝式に構成した複数の薬剤供給部36を、対応する主供給部26との機体横幅方向での同じ位置に配備している。【選択図】図8
