Work vehicle reducing a load applied to an operator in seedling planting work

This invention aims to provide a work vehicle. A conventional rice planting machine has a seedling planting device comprising a seedling mat mounting part on which a seedling mat is mounted, a seedling planting part for planting seedlings on the seedling mat, and a seedling take-out amount adjusting mechanism for adjusting an amount of seedlings which are taken out from the seedling mat and are planted. For the work vehicle such as the conventional rice planting machine, it is desired for reducing a load applied to an operator in seedling planting work. There is provided a rice planting machine comprising: a seedling planting device (100) having a seedling take-out amount adjusting mechanism (130) for adjusting an amount of taken out seedlings; a drive force generator (500) for generating a drive force for driving the seedling take-out amount adjusting mechanism (130); and a seedling take-out amount adjusting drive force transmission member (600) for transmitting the drive force to the seedling take-out amoun