PROBLEM TO BE SOLVED: To provide a seedling transplanter capable of holding a seedling planting part at a prescribed position even if there occurs the aged deterioration of a hydraulic valve for solving such a problem in which a conventional seedling transplanter having a turn conjunction mechanism comprises a hydraulic cylinder and a hydraulic valve for ascending and descending the seedling transplanter, however, the timing of the ascending and descending of the seedling transplanter is displaced when the seedling plating part cannot be held in a prescribed position due to the aged deterioration of the hydraulic valve, and the planting accuracy of seedlings is deteriorated.SOLUTION: The problem is solved by arranging a seedling transplanter which comprises a turn conjunction mechanism for switching an ascending/descending state or the like of a seedling planting part (40) in conjunction with a turn operation of a steering member (31), and in which a holding member for holding a position of the seedling planting part (40) at the ascending and descending is arranged, and the holding member holds an ascending position of the seedling planting part (40) until the seedling planting part (40) is descended after being ascended by the turn conjunction mechanism.
