To provide the subject rice-transplanter capable of preventing the chemicals spreader from obstructing and folding/storing seedling platforms disposed in the lateral ends by mounting a chemicals spreader behind the seedling platforms for taking a specific form.

This rice-transplanter is formed by foldably mounting lateral seedling platforms 16, wherein a chemicals spreader 50 is so mounted behind the platforms 16 as to be able to move in the longitudinal direction of the machine body when laterally viewed. The chemicals spreader 50 is pref. positioned before the tail end of the planting section in operation and behind the tail end in non-operation, and the spreader 50 pref. moves while rotating around the center of the lower end of a PTO axis 24 or drive rod 61.