PROBLEM TO BE SOLVED: To prevent excessive longitudinal feed of a seedling mat, when planting a high-density raising seedling mat.SOLUTION: A rice transplanter 1 includes a seedling planting device 23 in which seedlings are scraped by a planting claw 30 from a seedling mat placed on a seedling placing stand 29 having a seedling longitudinal feed belt 155 for seedling mat conveyance, and are planted on a farm field. The rice transplanter is constituted so that, when planting a high-density raising seedling mat, a seedling longitudinal feed amount of a seedling mat by the seedling longitudinal feed belt 155 is small in comparison with a planting time of a standard-type raising seedling mat in which seedlings are grown with a lower density than the high-density raising seedling mat.SELECTED DRAWING: Figure 9【課題】高密度育苗の苗マットの植付時における苗マットの過剰な縦送りを防止する。【解決手段】田植機１は、苗マット搬送用の苗縦送りベルト１５５を有する苗載台２９に載置された苗マットから植付爪３０で苗を掻き取って圃場へ植え付ける苗植付装置２３を備え、高密度育苗の苗マットの植付時には、高密度育苗の苗マットよりも苗が低密度に生育された標準型育苗の苗マットの植付時に比べて、苗縦送りベルト１５５による苗マットの苗縦送り量を少なくするように構成している。【選択図】図９
