PROBLEM TO BE SOLVED: To provide the subject device capable of promoting stable plant raising and rooting and having economical effect owing to the system's inexpensive price. SOLUTION: This device is so designed that air, warm air or cool air is taken into the inner intermediate layer of a sheet-like tray 15 with bag-shaped multilayer structure for hydroponics and also air, warm air, cool air, water, warm water or cool water is taken into a bag-shaped projection on the top face of the sheet-like tray 15 to enable a plant to be raised in higher efficiency at low cost.
