To provide a plant cultivation planter for which a wasted high-pressure metal container can be reused for a long period of time and also reused even after wasted to result in effective utilization of waste material resource so as to greatly contribute to global environmental issues.

The plant cultivation planter is formed by applying rust-preventive coating material on the whole inner and outer surfaces of a planter main body 1 obtained by cutting the wasted high-pressure metal container 4 to be formed with an upper part open, and preparing draining holes 2 and supporting legs 3 at the bottom surface of the planter main body 1.