There is provided a plant holder capable of, with a simple configuration, causing a root of a plant stock to pass through a holding hole downwardly without damaging the root of the plant stock, preventing a leaf from drooping downward and being damaged, and improving workability when transplantation and harvest are automated without damaging the plant stock by contact with the plant stock.A plant holder 110 includes a fitting portion 111 and having a plant stock support hole 114 in an inner surface, a placement portion 113 which is provided above the fitting portion 111, and a flange portion 112 which is provided above the placement portion 113. The outer diameter of the placement portion 113 is formed smaller than the outer diameter of the flange portion 112, and larger than the outer diameter of the holding hole 121.
