The objective of the present invention is to provide a sealing device with which it is possible to improve sealing properties, in particular sealing properties with respect to muddy water, while meeting demands for low torque. In order to achieve this objective, the sealing device of the present invention is configured by combining a lip seal attached to a non-rotating stationary member with a seal flange attached to a rotating member. The lip seal is provided with a lip seal main body including end-surface lips which come into slidable contact with the seal flange, an outward-facing flange portion, and a cylindrical outer peripheral cylinder portion disposed on an outer peripheral side of the stationary member. The seal flange is provided with a seal flange main body with which the end-surface lips come into slidable contact, and an outer peripheral side cylindrical portion disposed further to the outside than the outer peripheral cylinder portion of the lip seal member, without being in contact therewith. Furthermore, a non-contact type labyrinth seal having a prescribed axial-direction length is provided between the outer peripheral cylinder portion of the lip seal and the outer peripheral side cylindrical portion of the seal flange.