PROBLEM TO BE SOLVED: To provide a seedling transplanter having good workability, capable of readily keeping interval of a headland F constant in a simple constitution in order to solve troubles in which interval of the headland varies because timing for rotating the machine body at levee A4 and A3 in the headland F is determined by rough estimate of distance of an operator from levee and when interval of the headland F is wide in subsequent planting into the headland F, a portion without being planted is left and replanting of seedlings must be carried out by the operator and as a result, workability becomes extremely bad and when interval of the headland F is narrow, double planting is carried out and seedlings are wasted and has bad influence upon growth of seedlings. SOLUTION: This seedling transplanter is obtained by arranging plural seedling transplanting apparatuses 13 in rows at a prescribed intervals in left and right directions on a seedling transplanting device 10. In the seedling transplanter, levee marker 34 in which distance of the transplanting apparatuses 13 from seedling transplanting position when viewed from the side of machine body exhibits position nearly corresponding to left and right width of the seedling transplanting device 10 is installed in the front of the machine body.