To provide a rolling bearing which has channels in it, is small-sized and can be sealed without being moved under the pressure of a fluid and to provide a sealing device for it.

This sealing device 8 is provided with two seals 9 made of a flexible material, held against each other by a metal reinforcing member 10 and arranged on the same axis. Each seal 9 has a ring of axial teeth 16 separated from one another by circumferential gaps. The dimensions of the teeth and of the gaps separating them are such that when the two seals 9 of the sealing device 8 are held against each other, the teeth of one of the seals 9 of the sealing device 8 penetrate between the teeth of the other seal 9 of the sealing device 8, thus forming radial channels for the flow of a fluid through the sealing device 8.