To narrow the width of a seedling table by moving a movable seedling loading part attached at one edge of the lateral direction of a machine body toward the seedling table.

Only the seedling placing part positioning at the left edge in the lateral direction of a working body among the plural seedling loading parts 13a, 13b is made to be movable in an unfolded state of a seedling table. The movable seedling loading part 13b is turned and folded against a fixed seedling loading part 13a through a swinging arm and a connection link. This allows to narrow the width of a seedling table consisting of e.g. 5-row loading parts 13a, 13b by one row and reduce it to the width corresponding to a seedling table having 4-row loading parts 13a, 13b.