PROBLEM TO BE SOLVED: To provide a seedling transplanter allowing a planting lifting/lowering lever to be operated to a lifting side in turning.SOLUTION: The seedling transplanter includes: a steering member 34 operating a travel direction of a travel vehicle body 2; a planting device 52 arranged on a rear side of the travel vehicle body 2 and planting a seedling; a work operation lever 33 operating lifting/lowering and planting of the planting device 52; intermediate mechanisms 74, 77 switching lifting/lowering and planting operation on the basis of an operation of the work operation lever 33; and a turn interlock mechanism which lowers the planting device 52 by being interlocked with a turn operation of the steering member 34 and starts planting by the planting device 52. The turn interlock mechanism includes interlock stop mechanisms 99, 100 which stop the turn interlock by the turn interlock mechanisms when the work operation lever 33 is operated in a direction lifting or stopping the planting device 52 a
