<P>PROBLEM TO BE SOLVED: To provide a rice transplanter preventing generation of floating seedlings and preventing seedlings from falling down by making transplanting holes formed by a planting tine smaller irrespective of the size of planting spacing of seedlings. ??<P>SOLUTION: The rice transplanter is provided with an interroot transmission 60 realizing at least three different gear ratios, and a gear ratio switching device 91 provided with a gear pair 97 which rotates with constant velocity, an unequal velocity rotating gear pair 98 which reduces velocity when the tip of the planting tine 16c is transplanting, and an unequal velocity rotating gear pair 99 which increases the velocity when the tip of the planting tine 16c is transplanting, wherein the interroot transmission 60 and the gear ratio switching device 91 are serially linked. ??<P>COPYRIGHT: (C)2010,JPO&INPIT ??
