PROBLEM TO BE SOLVED: To repeatedly use a hydroponic panel by preventing invasion of plant roots into a panel body and antibacterially treating the inside of the panel body. SOLUTION: Emulsion resin 14 is loaded in gaps 13 among a plurality of foam resin beads 12 which form the panel body. Silver zeolite 16 is blended as an antibacterial inorganic material in the emulsion resin 14, and invasion of plant roots into the gaps 13 is prevented by an excellent chemical effect of the silver zeolite 16. COPYRIGHT: (C)2012,JPO&INPIT