PROBLEM TO BE SOLVED: To provide a hydroculture plant-growing tray that enables easy and stable aquaculture making use of existing water tanks, water lily pots etc.SOLUTION: A hydroculture plant-growing tray floating on water to hold plants comprises: a first air reservoir that is convex upward and arranged continuously and integrally with the outermost circumference pot parts that are arranged inside the first air reservoir and each accommodate a plant-holding member to hold a plant and second air reservoirs that are convex upward and formed between the first air reservoir and the pot parts to surround the circumference of the pot parts.
