PROBLEM TO BE SOLVED: To provide a laver raw alga storage and supply tank capable of saving time and labor required for a residue removal work (cleaning work), removing uselessness in culturing the laver and improving the hygienic conditions.SOLUTION: A storage and supply laver raw alga tank (1) for storing a laver raw alga and supplying it to a laver producing device in the present invention includes a water level sensor (12) for measuring a water level in the tank, a stirring blade (8) for stirring the laver raw alga in the tank, and a cleaning nozzle (13) for jetting cleaning water to the stirring blade (8), wherein when it is detected that the stirring blade (8) is exposed on the water surface from the water level in the tank measured by the water level sensor (12), the cleaning water is jetted from the cleaning nozzle (13) to the stirring blade (8) exposed on the water surface； the stirring blade (8) includes plural stirring blade bodies (9, 10, 11) vertically arranged, and when it is detected that any of the stirring blade bodies (9, 10, 11) is exposed on the water surface, the cleaning water is jetted to the stirring blade bodies (9, 10, 11) exposed on the water surface； and the cleaning water is jetted as well from the cleaning nozzle (13) to a wall surface exposed on the water surface in the tank.SELECTED DRAWING: Figure 1
