Abstract: A sealing device disposed between inner and outer members that rotate relative to each other for sealing a gap between the inner and outer members, includes a first sealing member to be mounted on the outer member and a second sealing member to be mounted on the inner member. Water-discharging protrusions protrude in a space between the second sealing member and the first sealing member. The water-discharging protrusions are arranged in a circumferential direction. Each protrusion has an inclined side surface intersecting at an acute angle with a rotational direction in which at least one of the inner and outer members rotates. The first sealing member has an annular labyrinth lip protruding toward the flange part of the second sealing member and is not in contact with the second sealing member, the labyrinth lip overlapping the water-discharging protrusions in radial directions and being disposed radially inside the water-discharging protrusions.