A paddy field working machine

The invention provides a paddy field working machine which can fully guarantee the carrying wind quantity of a blower. The paddy field working machine comprises a powder supply device used for supplying powder to farmland. The powder supply device comprises: a blower (35) used for generating carrying wind; a guide unit carrying and guiding powder via the carrying wind; a suction guide pipe (C) providing carrying air for a suction unit of the blower (35) at another position different from a mounting position of the blower of a running vehicle body, wherein the air flow direction of the suction guide pipe (C) intersects with the suction direction of the suction unit. The connecting portion of the suction guide pipe (C) and the suction unit is provided with an expansion unit (H) which enables an air flow space for the flow of the carrying air to expand towards the position different from the suction guide pipe (C). 本发明的水田作业机能够充分地确保鼓风机的搬运用风量。该水田作业机具有向农田提供粉粒体的粉粒体供给装置，该粉粒体供给装置具有：鼓风机(35)，生成搬运风；引导部，通过搬运风搬运引导粉粒体；以及吸气导