PROBLEM TO BE SOLVED: To practically dispose clutches for connecting or disconnecting transmissions from a seedling transport-driving shaft to driving rollers in a seedling transplanter. SOLUTION: This seedling transplanter which has seedling transport means for transporting seedlings on a seedling tray to seedling-taking ports with seedling-planting devices for planting rows, respectively, and a laterally long seedling transport-driving shaft for transmitting to the seedling transport means so that the transport from the seedling transport-driving shafts to the seedling transport means are stopped for each seedling transport-driving unit for a plurality of rows is characterized in that the right and left end portions of the seedling tray can inward be moved only in the right and left widths of the seedling transport-driving units to contract the lateral width of the seedling tray and further in that clutches for connecting or disconnecting the transmission from the seedling transport-driving shaft to the seedling transport means of the rows in the right and left end portions are disposed in fence portions for dividing the row portions in the right and left end portions. COPYRIGHT: (C)2004,JPO