PROBLEM TO BE SOLVED: To provide a tree core pot prevented from wood quality deterioration and bark peeling caused by stored water when using woody material as a flower base so as to maintain the beauty of natural wood and facilitate elimination of water stain generated by stored water so as to get free from water quality deterioration. SOLUTION: The tree core pot is produced through the following process: making a wood block by using undried natural wood with bark as raw material; subjecting the circumference of the wood block to resin treatment to be sealed so as to prevent moisture evaporation to the outside; boring a core material part of the wood block so as not to make the water get to the peripheral material part of the wood block even when the water is stored in the bored part; subjecting the surface of the core material part comprising the bored part to resin treatment to easily eliminate water stains; and putting peat moss in the water stored in the bored part to prevent water quality deterioration. COPYRIGHT: (C)2007,JPO&INPIT