PROBLEM TO BE SOLVED: To enable automatic control of a seedling-feed table for feeding rice plant seedlings from a spare seedling storage unit to a seedling platform without trouble even when the feed table would be in contact with a seedling receiver in the platform. SOLUTION: A seedling guide 41c of a seedling-feed table 41 for feeding rice plant seedlings to a seedling platform 13 is freely swingably equipped with a moving part 41e. While another moving part 60d is provided on a receiving part 60 on the platform 13. When the seedling-feed table 41 moves to the platform 13 from the lower side to the upper side and thus is brought into contact with the receiving part 60, the feed table 41 moves as it pushes up the moving part 60d with its moving part 41e to push it back. When the seedling-feed table 41 moves toward the seedling platform 13 from the upper side to the lower side and is in contact with the seedling receiver 60, the feed table 41 moves, as the moving part 41e is pushed up and swung with the moving part 60d. After the feed table moves, both moving parts 60d and 41e automatically go back to the original positions by their own righting moments.