SEALING DEVICE

Provided is a sealing device with which the occurrence of penetration cracks in the rubber material of an elastic body part can be further suppressed. The sealing device (1) is provided with a sealing device main body (10) attached to an outer-peripheral member (101) and a slinger (40) attached to an inner-peripheral member (102). The sealing device main body (10) is provided with an annular reinforcing ring (20) centered on an axial line (Y1) and an annular elastic body part (30) comprising an elastic body that is attached to the reinforcing ring (20) and that is centered on the axial line (Y1). A through-hole (24) running between the inner-space-side surface and the atmosphere-side surface of the reinforcing ring (20) is formed in the reinforcing ring (20), and a positioning part (36) for fixing the position of the reinforcing ring (20) during vulcanization is formed in the inner-space-side surface of the elastic body part (30). In the sealing device (1), the through-hole (24) and the positioning part (36)