To provide a transplanter suppressing the complexity of a structure and the increase of weight to the minimum when arranging an adjuster for adjusting the planting depth of the seedlings by the planting section in the transplanter supporting a planting section receiving seedlings rotated and carried while being held by a rotating body and planting the same in ridges of an agricultural field.

In the transplanter having the adjuster for adjusting the planting depth of the seedlings by the planting section 6, a supporting mechanism for changing the relative height of the planting section 6 to the travelling sections 1, 2 by vertically oscillatably supporting a planting side transmitting mechanism 11 transmitting power to the planting section 6 in the travelling machine body 3 side is installed, the above adjuster is constituted of the supporting mechanism, a rotating body side transmitting mechanism 12 taking out the power transmitted to the planting side transmitting mechanism 11 and transmitting the same to the rotating body 4 side is installed, and an accommodation unit 59 allowing the vertical oscillation of the planting side transmitting mechanism 11 to the rotating body side transmitting mechanism 12 is installed.