PROBLEM TO BE SOLVED: To provide a seedling planter which can plant seedlings, in a state where the amount of the seedlings is as uniform as possible, even if the slippage of the seedlings is caused on the longitudinal conveyance of the mat-like seedlings and can plant the seedlings in the small number of rows in a simple structure.SOLUTION: This seedling planter includes driving-changing mechanisms 80 for changing the driving quantities of longitudinally conveying conveyers for longitudinally conveying mat-like seedlings on a seedling tray, and seedling slippage detection means 101 for detecting the longitudinal slippage quantities of the mat-like seedlings, in a state where the longitudinally conveying conveyers are stopped for a plurality of seedling planting unit rows, respectively, and further includes a control means 95 linked to the driving-changing mechanisms 80. The control means 95 sets corrected control target longitudinal conveying quantities, obtained by correcting set control target conveying quantities by a longitudinal conveying quantity-setting means 96, on the basis of detected slippage quantities by the seedling slippage detection means 101, for the seedling-planting unit rows, respectively, and controls and operates the driving-changing mechanisms 80 so that the mat-like seedlings are longitudinally conveyed in the set corrected control target longitudinal conveying quantities. The control means 95 controls and operates the driving-changing mechanisms 80 in a longitudinal conveyer-stopping state, on the basis of a stop command of a command means 112 for outputting a command that performs or stops the seedling longitudinal conveyance by the longitudinally conveying conveyers.COPYRIGHT: (C)2009,JPO&INPIT【課題】 マット状苗の横送り時におけるずれ動きが発生しても、苗の使用量を極力均一にした状態で苗植付けをすることができ、かつ、少数条植えを構造簡単にできる苗植付け装置を提供する。【解決手段】 苗載せ台のマット状苗を縦送りする縦送り搬送体の駆動量を変更する駆動変更機構80と、縦送り搬送体が停止された状態でのマット状苗の縦移動量を検出する苗ずれ量検出手段101とを複数の苗植え単位条毎に備えてある。駆動変更機構80に連係された制御手段95を備えてある。制御手段95は、苗植え単位条毎に、縦送り量設定
