A thin film cleaning system, comprising: a thin film, a cleaning bath in which a fluid is stored so that the thin film is capable of moving while being immersed therein; and a fluid supplying apparatus (10, 20, 30, 40, 50, 60) comprising: an inner tube (14, 24, 34, 44) having a plurality of holes (13, 23, 33, 43) for distributing a cleaning fluid supplied from a supply unit; and an outer tube (16, 26, 36, 46) arranged to surround the inner tube (14, 24, 34, 44) and having a plurality of slots (15, 17, 25, 27, 35, 37, 45, 47) for injecting the cleaning fluid distributed therein from the holes (13, 23, 33, 43) to the outside, wherein both ends of the inner tube (14, 24, 34, 44) and the outer tube (16, 26, 36, 46) are closed, the inner tube (14, 24, 34, 44) and the outer tube (16, 26, 36, 46) are coaxially arranged, the slots (15, 17, 25, 27, 35, 37, 45, 47) include first side slots (15, 25, 35, 45) arranged in one side of the outer tube (16, 26, 36, 46) in a length direction, and second side slots (17, 27, 37, 47) arranged in the other side of the outer tube (16, 26, 36, 46) to be opposite to the first side slots (15, 25, 35, 45), wherein the first side slots (15, 25, 35, 45) are arranged in a row at regular intervals in a length direction of the outer tube (16, 26, 36, 46), and the second side slots (17, 27, 37, 47) are formed symmetrically based on the center of the outer tube (16, 26, 36, 46), the fluid supplying apparatus (10, 20, 30, 40, 50, 60) is disposed spaced apart from the thin film by a predetermined distance and arranged in the cleaning bath so that the center line in the length direction of the fluid supplying apparatus (10, 20, 30, 40, 50, 60) is parallel to the length or width direction of the thin film, and if the center line of the fluid supplying apparatus (10, 20, 30, 40, 50, 60) in the length direction is arranged in parallel to the length direction of the thin film, the fluid injected through the outer tube (16, 26, 36, 46) of the double-tube type fluid supplying apparatus (10, 20, 30, 40, 50, 60) is injected to both lateral sides with respect to the length direction of the thin film, while, if the center line of the fluid supplying apparatus (10, 20, 30, 40, 50, 60) in the length direction is arranged in parallel to the width direction of the thin film, the fluid is injected to both front and rear sides with respect to the moving direction of the thin film. a thin film, a cleaning bath in which a fluid is stored so that the thin film is capable of moving while being immersed therein; and a fluid supplying apparatus (10, 20, 30, 40, 50, 60) comprising: an inner tube (14, 24, 34, 44) having a plurality of holes (13, 23, 33, 43) for distributing a cleaning fluid supplied from a supply unit; and an outer tube (16, 26, 36, 46) arranged to surround the inner tube (14, 24, 34, 44) and having a plurality of slots (15, 17, 25, 27, 35, 37, 45, 47) for injecting the cleaning fluid distributed therein from the holes (13, 23, 33, 43) to the outside, wherein an inner tube (14, 24, 34, 44) having a plurality of holes (13, 23, 33, 43) for distributing a cleaning fluid supplied from a supply unit; and an outer tube (16, 26, 36, 46) arranged to surround the inner tube (14, 24, 34, 44) and having a plurality of slots (15, 17, 25, 27, 35, 37, 45, 47) for injecting the cleaning fluid distributed therein from the holes (13, 23, 33, 43) to the outside, wherein both ends of the inner tube (14, 24, 34, 44) and the outer tube (16, 26, 36, 46) are closed, the inner tube (14, 24, 34, 44) and the outer tube (16, 26, 36, 46) are coaxially arranged, the slots (15, 17, 25, 27, 35, 37, 45, 47) include first side slots (15, 25, 35, 45) arranged in one side of the outer tube (16, 26, 36, 46) in a length direction, and second side slots (17, 27, 37, 47) arranged in the other side of the outer tube (16, 26, 36, 46) to be opposite to the first side slots (15, 25, 35, 45), wherein the first side slots (15, 25, 35, 45) are arranged in a row at regular intervals in a length direction of the outer tube (16, 26, 36, 46), and the second side slots (17, 27, 37, 47) are formed symmetrically based on the center of the outer tube (16, 26, 36, 46), the fluid supplying apparatus (10, 20, 30, 40, 50, 60) is disposed spaced apart from the thin film by a predetermined distance and arranged in the cleaning bath so that the center line in the length direction of the fluid supplying apparatus (10, 20, 30, 40, 50, 60) is parallel to the length or width direction of the thin film, and if the center line of the fluid supplying apparatus (10, 20, 30, 40, 50, 60) in the length direction is arranged in parallel to the length direction of the thin film, the fluid injected through the outer tube (16, 26, 36, 46) of the double-tube type fluid supplying apparatus (10, 20, 30, 40, 50, 60) is injected to both lateral sides with respect to the length direction of the thin film, while, if the center line of the fluid supplying apparatus (10, 20, 30, 40, 50, 60) in the length direction is arranged in parallel to the width direction of the thin film, the fluid is injected to both front and rear sides with respect to the moving direction of the thin film.