Sealing device

A sealing device provided with, on an atmospheric side inclined surface of a seal lip, a forward direction screw which extends in a direction of forming an angle of attack with respect to a direction of forward rotation of a rotation shaft and exerts pumping action with respect to sealing target fluid during the forward rotation of the rotation shaft, and a reverse direction screw which extends in a direction of forming an angle of attack with respect to a direction of reverse rotation of the rotation shaft and exerts pumping action with respect to the sealing target fluid during the reverse rotation of the rotation shaft,

• wherein a droplet prevention screw for the sealing target fluid is provided on the reverse direction screw side of the atmospheric side inclined surface and extending directly from the forward direction screw and to a ridge portion of the seal lip so as to be positioned in a region for forming the angle of attack.