PROBLEM TO BE SOLVED: To provide a fuel-efficient seedling transplanter whose fuel consumption during the work is suppressed.SOLUTION: The seedling transplanter includes: an engine 20 and a hydraulic continuously variable transmission 23 in a traveling body 2； a seedling planting device 52 in the rear of the traveling body 2 for planting seedling in a field； and a speed change operation lever 8 for operating the forward/backward movement of a machine body and the traveling speed by changing the output of the hydraulic continuously variable transmission 23. The seedling transplanter further includes: a variable actuator 29 which can change the driving capacity in the hydraulic continuously variable transmission 23； a first traveling detection member 14 and a second traveling detection member 9 for detecting the traveling state of the traveling body 2； and a control device 6 for controlling the driving capacity of the variable actuator 29 and the rotational frequency of the engine 20 according to the traveling state detected by the first traveling detection member 14.【課題】本発明では、作業時の燃料消費を抑えた、低燃費の苗移植機を提供することを課題とする。【解決手段】走行車体２にエンジン２０と油圧無段変速装置２３を設け、走行車体２の後部に圃場に苗を植え付ける苗植付装置５２を設け、油圧無段変速装置２３の出力を切り替えて機体の前後進及び走行速度を操作する変速操作レバー８を設けた苗移植機において、油圧無段変速装置２３に駆動容量を変更可能な可変アクチュエータ２９を設け、走行車体２の走行状態を検知する第１走行検知部材１４と第２走行検知部材９を設け、第１走行検知部材１４の検知する走行状態に合わせて可変アクチュエータ２９の駆動容量とエンジン２０の回転数を制御する制御装置６を設けて構成する。【選択図】 図５
