PROBLEM TO BE SOLVED: To arrange fertilizer tanks dividedly right and left without impairing a right and left balance in a seedling transplanter for planting of odd rows in which the fertilizer tank of a fertilizer applicator is arranged at the rear of a seat installed on a traveling body and a seedling planting part is laid behind the fertilizer tank. SOLUTION: The fertilizer tanks are constituted of a left fertilizer tank 220L and a right fertilizer tank 220R positioned at both left and right sides with the seat 22 in-between. The volumes of the right and left fertilizer tanks are mutually differed and the fertilizer tank 220R of the smaller volume is installed at a position farther away from the center of the right and left of the machine body than the fertilizer tank 220L of the larger volume. A blower 22 for supplying air to transport a fertilizer sent from the fertilizer tanks to a fertilizing part is installed at the side where the fertilizer tank 220R of the smaller volume is arranged.