A grafted seedling producing device including a stock seedling holding unit that holds and conveys a stock seedling, a stock cutting unit that cuts the stock seedling held by the stock seedling holding unit, and a joining unit that joins the stock seedling conveyed by the stock seedling holding unit and a scion seedling, the stock cutting unit including a stock cutter unit that includes a stock blade for cutting the stock seedling by a predetermined stock cutter trajectory, the stock seedling holding unit holding an embryonic stem of a seedling for grafting at a predetermined position on the stock cutter trajectory in a vertical posture, the grafted seedling producing device includes: a supporting unit configured to retract the stock cutter unit from an advance position for cutting in proximity to the stock seedling holding unit； and a stock pressing member that presses and fixes a portion ahead of a cutting position of the embryonic stem from a seedling holding position against the stock seedling holding unit side at the advance position.
