PROBLEM TO BE SOLVED: To provide a riding rice planting machine that improves operability of changing a seedling picking amount.SOLUTION: A riding rice planting machine includes position change units 12, 12a for vertically supporting a seedling platform 10 and a seedling take-out opening 38a in a position changing manner, and also includes a seedling picking amount actuator 14 where a planting arm 8 passes through the seedling take-out opening 38a to change the seedling picking amount of picking the seedling by operating the position change units 12, 12a and vertically changing the position of the seedling platform 10 and the seedling take-out opening 38a. The riding rice planting machine includes a seedling picking amount control unit for issuing an operation command to the seedling picking amount actuator 14, and includes a seedling picking amount sensor 44 for detecting a seedling picking amount being set by the seedling picking amount actuator 14.SELECTED DRAWING: Figure 7【課題】乗用型田植機において、苗取り量の変更の操作性を向上させる。【解決手段】苗のせ台１０及び苗取り出し口３８ａを上下に位置変更自在に支持する位置変更部１２，１２ａを備え、位置変更部１２，１２ａを操作して苗のせ台１０及び苗取出し口３８ａの位置を上下に変更することにより、植付アーム８が苗取り出し口３８ａを通過して取り出す苗の苗取り量を変更する苗取り量アクチュエータ１４を備える。苗取り量アクチュエータ１４に作動指令を出す苗取り量制御部を備え、苗取り量アクチュエータ１４により設定される苗取り量を検出する苗取り量センサー４４を備える。【選択図】図７
