The present invention provides a plant transplanting device that achieves rapid and stable transplantation with a simple structure and at low cost, prevents damage to the plants, and can be automated easily. A plant transplanting device 100 that transplants a seedbed B from a plant holder 110 to a growing pallet 120 includes a holder holding mechanism 130 for holding the plant holder 110, a pallet holding mechanism 140 for holding the growing pallet 120 above a holder holding position in which the holder holding mechanism 130 holds the plant holder 110, and a push-up mechanism 150 for pushing the seedbed B held in the holder seedbed-holding hole 111 upward so as to insert the seedbed B into the pallet seedbed-holding hole 121.
