Sealing device

A sealing device for sealing a gap between a through-hole and a shaft inserted through the through-hole, comprising:

• an annular reinforcement ring around an axis;
• and
• an elastic portion around the axis, the elastic portion being formed of an annular elastic material and being attached to the reinforcement ring,
• wherein:
• the elastic portion includes an annular seal lip having an outer periphery side and an inner periphery side,
• a garter spring is fitted to the outer periphery side of the seal lip;
• the seal lip includes an annular lip tip end portion protruding to the inner periphery side and formed to contact the shaft, and an interior side dust lip that is an annular protrusion provided closer to a sealing target side than is the lip tip end portion in a direction of the axis,
• the interior side dust lip protrudes toward the axis and is formed to contact the shaft,
• the seal lip includes a dent portion on an outer periphery side of a base of the interior side dust lip, the dent portion forming a dent,
• the outer periphery side of the elastic portion extends away from the garter spring and is connected to the outer periphery side of the base of the interior side dust lip, the outer periphery side of the base defining a linear surface and the dent extending axially inward from the linear surface, and
• the dent portion extends in an intermittent annular shape around the axis.