PROBLEM TO BE SOLVED: To provide a riding-type rice planting machine in which it is avoided that a planting work machine arrives at a planting start distance before being grounded, even if a vehicle speed during turning at a butt is faster than a reference vehicle speed.SOLUTION: A riding-type rice planting machine includes: turning start determination means for determining that a traveling machine body 1 starts turning by detecting a steering operation from the straight traveling position side of a front wheel 9 using front wheel steered angle detection means to a predetermined steering angle planting work machine automatic lowering means for automatically lowering a planting work machine 3, when a travel distance L from a turning start arrives at a predetermined lowering start distance L1 planting clutch automatic input means for automatically inputting a planting clutch, when the travel distance L from the turning start arrives at a predetermined planting start distance L2 and lowering start distance correcting means for correcting the lowering start distance L1 according to a vehicle speed Vs during turning.COPYRIGHT: (C)2015,JPO&INPIT【課題】枕地旋回における車速が基準の車速よりも速い場合であっても、植付作業機が接地する前に植付開始距離に到達することを回避する。【解決手段】乗用型田植機において、前輪切れ角検出手段による前輪9の直進位置側から所定の切れ角への操向操作の検出によって走行機体1が旋回を開始したと判断する旋回開始判断手段と、旋回開始からの走行距離Lが既定の下降開始距離L1に到達したとき、植付作業機3を自動的に下降させる植付作業機自動下降手段と、旋回開始からの走行距離Lが既定の植付開始距離L2に到達したとき、植付クラッチを自動的に入りにする植付クラッチ自動入り手段と、前記下降開始距離L1を、旋回中の車速Vsに応じて補正する下降開始距離補正手段とを備える。【選択図】図10
