A sealing device adapted to be disposed between an inner member and an outer member that rotate relative to each other, and configured to act to seal a gap between the inner member and the outer member, the sealing device comprising: a first sealing member having a cylindrical part adapted to be mounted to the outer member, and an annular part that extends radially inward from the cylindrical part toward the inner member and that has a first surface; and a second sealing member having a sleeve adapted to be mounted to the inner member and to be disposed around the inner member, and a flange that extends radially outward and perpendicularly to the axis of the sleeve, the flange facing the annular part of the first sealing member and having a second surface that is parallel to the first surface of the annular part of the first sealing member, wherein: the first sealing member further has at least three axial lips (24D, 24E, 24F) made from an elastic material, the at least three axial lips extending from the first surface of the annular part; the elastic material extends toward the flange of the second sealing member, distal ends of the axial lips (24D, 24E, 24F) being in contact with the second surface of the flange of the second sealing member, and the axial lip (24E, 24F) disposed on a radially outer side has an interference (le, If) that is greater than that (Id, le) of the axial lip (24D, 24E) disposed on a radially inner side, characterized in that: the at least three axial lips extend radially outward from the first surface of the annular part. a first sealing member having a cylindrical part adapted to be mounted to the outer member, and an annular part that extends radially inward from the cylindrical part toward the inner member and that has a first surface; and a second sealing member having a sleeve adapted to be mounted to the inner member and to be disposed around the inner member, and a flange that extends radially outward and perpendicularly to the axis of the sleeve, the flange facing the annular part of the first sealing member and having a second surface that is parallel to the first surface of the annular part of the first sealing member, wherein: the first sealing member further has at least three axial lips (24D, 24E, 24F) made from an elastic material, the at least three axial lips extending from the first surface of the annular part; the elastic material extends toward the flange of the second sealing member, distal ends of the axial lips (24D, 24E, 24F) being in contact with the second surface of the flange of the second sealing member, and the axial lip (24E, 24F) disposed on a radially outer side has an interference (le, If) that is greater than that (Id, le) of the axial lip (24D, 24E) disposed on a radially inner side, characterized in that: the at least three axial lips extend radially outward from the first surface of the annular part. the first sealing member further has at least three axial lips (24D, 24E, 24F) made from an elastic material, the at least three axial lips extending from the first surface of the annular part; the elastic material extends toward the flange of the second sealing member, distal ends of the axial lips (24D, 24E, 24F) being in contact with the second surface of the flange of the second sealing member, and the axial lip (24E, 24F) disposed on a radially outer side has an interference (le, If) that is greater than that (Id, le) of the axial lip (24D, 24E) disposed on a radially inner side, characterized in that: the at least three axial lips extend radially outward from the first surface of the annular part.