PROBLEM TO BE SOLVED: To provide a riding rice transplanter designed to obviate such a problem that a planting transmission case made up of a plurality of pipes and T-shaped joints for mutually connecting them requires providing the transmission case itself with an opening for integrating it with power transmission members and supporting members therefor. SOLUTION: This riding rice transplanter is so designed that a planting section 9 is mounted in a vertically movable way on the rear portion of a traveling vehicle, a planting transmission frame 92 for transmitting mechanical power from the input shaft 185 of the planting section to a planting tine 93 is made up from pipes and cross joints 167 for mutually connecting them, either one of the openings of the cross joints is used as an inserting port for assembling the frame and closed with a lid 168.
