A sealing device comprising: a slinger which is installed to one member among relatively rotating two members; a lip member which is installed to the other member; said slinger integrally having a tubular portion which is fitted to said one member and a flange portion which extends in a diametrical direction; and said lip member having an attachment ring, and a rubber-like elastic body, wherein the rubber-like elastic body integrally has an attached rubber portion, an end face lip which is supported to the attached rubber portion and slidably comes into close contact with said flange portion, and a radial lip which is supported to the attached rubber portion, wherein a bent portion protruding in an axial direction toward said lip member is provided in said flange portion positioned in an inner peripheral side of the end face lip, wherein a second non-contacting lip is provided by the rubber-like elastic body of the lip member so as to be positioned in an inner peripheral surface of a root portion of the end face lip and to be arranged toward the bent portion and structured such that the second non-contact lip does not come into contact with said slinger, wherein a labyrinth structure having a minute gap is provided between said bent portion and said lip member in that the minute gap is provided as a gap in an axial direction between the bent portion and the second non-contacting lip 36, wherein a lip end is arranged between said bent portion and said tubular portion, a non-contact lip structured such that the non-contact lip does not come into contact with said slinger is provided in said lip member, and characterised in that said radial lip slidably comes into close contact with an outer peripheral surface of the tubular portion, and a labyrinth structure having a minute gap is provided between said non-contact lip and said slinger in that the minute gap is provided in a diametrical direction between the non-contact lip and the tubular portion, and also provided as a gap in a diametrical direction between the non-contact lip and the bent portion so that both gaps are continuously provided. a slinger which is installed to one member among relatively rotating two members; a lip member which is installed to the other member; said slinger integrally having a tubular portion which is fitted to said one member and a flange portion which extends in a diametrical direction; and said lip member having an attachment ring, and a rubber-like elastic body, wherein the rubber-like elastic body integrally has an attached rubber portion, an end face lip which is supported to the attached rubber portion and slidably comes into close contact with said flange portion, and a radial lip which is supported to the attached rubber portion, wherein a bent portion protruding in an axial direction toward said lip member is provided in said flange portion positioned in an inner peripheral side of the end face lip, wherein a second non-contacting lip is provided by the rubber-like elastic body of the lip member so as to be positioned in an inner peripheral surface of a root portion of the end face lip and to be arranged toward the bent portion and structured such that the second non-contact lip does not come into contact with said slinger, wherein a labyrinth structure having a minute gap is provided between said bent portion and said lip member in that the minute gap is provided as a gap in an axial direction between the bent portion and the second non-contacting lip 36, wherein a lip end is arranged between said bent portion and said tubular portion, a non-contact lip structured such that the non-contact lip does not come into contact with said slinger is provided in said lip member, and characterised in that said radial lip slidably comes into close contact with an outer peripheral surface of the tubular portion, and a labyrinth structure having a minute gap is provided between said non-contact lip and said slinger in that the minute gap is provided in a diametrical direction between the non-contact lip and the tubular portion, and also provided as a gap in a diametrical direction between the non-contact lip and the bent portion so that both gaps are continuously provided.