A sealing apparatus which, in use, is attached between a shaft and an outer-peripheral-side member disposed on an outer peripheral side of the shaft about an axis, and which, in use, slidably contacts an outer peripheral surface of the shaft to provide a seal between the shaft and the outer-peripheral-side member, the sealing apparatus comprising: a reinforcing ring in an annular shape about the axis; an elastic body portion in an annular shape about the axis, which is attached to the reinforcing ring, and formed of an elastic body; wherein the elastic body portion includes a base portion, a lip portion which extends from the base portion along the axis, and a tension force applying member which is an elastic member in an annular shape, the lip portion includes a lip tip end portion at a tip end of the lip portion, the lip tip end portion having a lip contact end which is formed such that the lip contact end is capable of contacting the outer peripheral surface of the shaft in a slidable manner on the outer peripheral surface of the shaft, the tension force applying member is mounted on an outer peripheral side of the lip portion at the lip tip end portion to apply a tension force which presses the lip contact end against the outer peripheral surface of the shaft, wherein the elastic body portion includes at least one dust lip (84, 85) in an annular shape about the axis; the inner peripheral surface of the elastic body portion forms an inter-lip space which is an annular space, one end of the inter-lip space in a direction of the axis being the lip contact end, another end of the inter-lip space being a portion of the dust lip, characterized in that: an electrically conductive grease is applied to at least a portion of an inner peripheral surface of the elastic body portion, the inner peripheral surface being an annular surface which faces an inner periphery side; the elastic body has electrical conductivity; and the volume of the electrically conductive grease is 40% or more and 80% or less of a capacity of the inter-lip space. a reinforcing ring in an annular shape about the axis; an elastic body portion in an annular shape about the axis, which is attached to the reinforcing ring, and formed of an elastic body; wherein the elastic body portion includes a base portion, a lip portion which extends from the base portion along the axis, and a tension force applying member which is an elastic member in an annular shape, the lip portion includes a lip tip end portion at a tip end of the lip portion, the lip tip end portion having a lip contact end which is formed such that the lip contact end is capable of contacting the outer peripheral surface of the shaft in a slidable manner on the outer peripheral surface of the shaft, the tension force applying member is mounted on an outer peripheral side of the lip portion at the lip tip end portion to apply a tension force which presses the lip contact end against the outer peripheral surface of the shaft, wherein the elastic body portion includes at least one dust lip (84, 85) in an annular shape about the axis; the inner peripheral surface of the elastic body portion forms an inter-lip space which is an annular space, one end of the inter-lip space in a direction of the axis being the lip contact end, another end of the inter-lip space being a portion of the dust lip, characterized in that: an electrically conductive grease is applied to at least a portion of an inner peripheral surface of the elastic body portion, the inner peripheral surface being an annular surface which faces an inner periphery side; the elastic body has electrical conductivity; and the volume of the electrically conductive grease is 40% or more and 80% or less of a capacity of the inter-lip space. an electrically conductive grease is applied to at least a portion of an inner peripheral surface of the elastic body portion, the inner peripheral surface being an annular surface which faces an inner periphery side; the elastic body has electrical conductivity; and the volume of the electrically conductive grease is 40% or more and 80% or less of a capacity of the inter-lip space.