The present invention detects vertical displacement of front wheels and performs raising/lowering control and horizontal control of a transplanter according to changes in the vertical displacement so as to enable further improvement of transplantation accuracy. The present invention comprises: a traveling part 2 that is supported by front wheels 6, 6 and rear wheels 7, 7; a transplanter 20 that is supported on the traveling part such that the transplanter can be raised and lowered; a raising/lowering control part 60a that controls the raising/lowering of the transplanter 20; a float sensor 63 that is provided to a float 27 of the transplanter 20 and that detects raising/lowering displacement of the float 27; a suspension sensor 61 that detects extension/contraction displacement of a suspension mechanism provided to the front wheels 6, 6; and a tilt sensor 62 that is provided to the traveling part 2 and that detects tilting in the front-rear direction of a machine body. A gain map corresponding to the relation
