PROBLEM TO BE SOLVED: To provide an agricultural material-supplying device of a paddy field implement, easily performable of maintenance by making the lower side case part an opened posture opened with a sufficiently large angle even when other elements such as an exhaust duct are set at the upper side of a carrier pipe part.SOLUTION: A sending out case part 34 sending out granular agricultural materials in a hopper 31 by rotation of a sending out roll 37 is connectedly installed at the lower part of the hopper 31, and a blast pipe part 36a receiving pressure-feeding air and the carrying pipe part 55 sending out the sent out agricultural materials to the field are communicated and set at the lower part of the sending out case part 34. The sending out case part 34 has an upper case part 35 and a lower case part 36 swing-openably pivoted and connected to the upper case part 35 by turning around a first lateral axis X1 close to the carrying pipe part 55 than a sending out roll 37. The carrying pipe part 55 is pivoted and connected swing-openably on a lower case part 36 by turning around a second lateral axis X2 close to the lower end of the lower case part 36.【課題】搬送管部の上方に排出ダクトなどの他部材が設けられている場合でも、下方ケース部を十分に大きな角度で開いた開放姿勢としてメンテナンスを行い易い水田作業機の農用資材供給装置を提供する。【解決手段】ホッパ３１の下部に、繰出しロール３７の回転によってホッパ３１内の粉粒状の農用資材を繰出す繰出しケース部３４を連設し、繰出しケース部３４の下部に、圧送用空気を受け入れる送風管部３６ａと、繰出された農用資材を圃場に送り出す搬送管部５５とが連通配置され、繰出しケース部３４が、上方ケース部３５と繰出しロール３７よりも搬送管部５５寄りの第１横向き軸心Ｘ１回りで上方ケース部３５に揺動開閉自在に枢支連結された下方ケース部３６とを備え、搬送管部５５を、下方ケース部３６の下端付近の第２横向き軸心Ｘ２回りで、下方ケース部３６に揺動開閉自在に枢支連結している。【選択図】図９
