PROBLEM TO BE SOLVED: To prevent an unintended spacing gear change, and to increase the rigidity of a cover body.SOLUTION: In a sulky transplanter in which spacing gear change levers 16, 17 are arranged at an erecting part 27a which is raised by one stage at a floor of a drive part 22, an opening 27b is formed at a floor step 27 which is arranged at the floor of the drive part 22, the spacing gear change levers 16, 17 are arranged so that tip sides are protruded from the opening 27b, and when gear-changing a spacing gear change mechanism according to left and right oscillation operations of the spacing gear change levers 16, 17, protrusions 27c which are upwardly protruded and wholly or partially cover left and right both sides of the spacing gear change levers 16, 17 are formed at the periphery of the opening] 27b of the floor step 27, and the protrusions 27c are integrally formed at the floor step 27.COPYRIGHT: (C)2015,JPO&INPIT【課題】意に反した株間変速を防止するとともに、カバー体の強度アップを図る。【解決手段】株間変速レバー16、17を運転部22の床部で一段高くなった立設部27aに配置した乗用型田植機において、運転部22の床部に設けられるフロアステップ27に開口部27bを有し、該開口部27bから先端側が突出するように株間変速レバー16、17を配置し、該株間変速レバー16、17の左右揺動操作に応じて株間変速機構を変速動作させるにあたり、フロアステップ27の開口部27bの周辺で、かつ株間変速レバー16、17の左右両側方に、上方に突出して株間変速レバー16、17の左右両側方を全体的又は部分的に覆う凸部27cを備えるとともに、該凸部27cをフロアステップ27に一体成形した。【選択図】図4