A food washing apparatus of the invention includes an ozonized water generator (10), a cylindrical washing tank (1) in which the food materials are put and which can rotate to wash the food materials, a drainage part (4) formed at a part of the washing tank (1) and including openings to such a degree that water passes through and the food materials do not pass through, and wash water pipings (2, 9) which are inserted and disposed in the washing tank (1) in an axial direction and in which water spray holes (2a, 2a) for spraying wash water including at least ozonized water are formed, and while at least one part of the wash water sprayed from the wash water pipings (2, 9) is draind from the washing tank (1) every rotation of the washing tank (1), washing of the food materials is performed. Further, there is also a method in which a receiving tank (8) for wash water drained from the washing tank (1) is provided, and at least one part of the wash water in the receiving tank (8) is returned to an inlet side of the ozonized water generator (10) to perform cyclic use of the wash water.