PROBLEM TO BE SOLVED: To provide a paddy field working machine that is changed by a simple operation from a state in which powder particles are supplied in an embedded state in soil of paddy field to a state in which powder particles are supplied to the surface of paddy field or in its vicinity.SOLUTION: The paddy field working machine is equipped with a powder particle feeder for feeding powder particles to a paddy field with traveling of travel machine at a plurality of feed parts arranged in the direction of the width of the machine, and a feed position adjustment mechanism KT for changing the tip positions of a powder particle feed path of the plurality of feed parts of the powder particle feeder between a low-position feed state in which the tip positions are simultaneously driven into downward by a set depth or more from the paddy field and a high-position feed state in which the tip positions of the powder particle feed path are positioned at a position shallower than a set depth from the paddy field or at a position in the vicinity of the upper part of the paddy field.COPYRIGHT: (C)2012,JPO&INPIT【課題】簡単な操作で、田面の土中に埋め込む状態で粉粒体を供給する状態と、田面の表面又はその近傍に供給する粉粒体を供給する状態とに切り換えることが可能となる水田作業機を提供する。【解決手段】 走行機体の走行に伴って機体横幅方向に並ぶ複数の供給箇所において田面に粉粒体を供給する粉粒体供給装置が備えられ、粉粒体供給装置の複数の供給箇所の夫々における粉粒体供給経路の先端位置を、同時に、田面から設定深さ以上下方に入り込ませる低位置供給状態と、粉粒体供給経路の先端位置を田面から設定深さよりも浅い位置又は田面の上方近傍位置に位置させる高位置供給状態とに切り換え自在な供給位置調節機構ＫＴが備えられている。【選択図】図９
