A sealing device for a rolling bearing comprising: a first annular shield designed to be constrained to a first ring of the rolling bearing; a second annular shield arranged facing the first shield and designed to be constrained in use to a second ring of the rolling bearing; a first sealing gasket made of an elastomer and integrally carried by a first face of the first shield, the first gasket being provided with at least one annular sliding sealing lip intended to cooperate in contact, in use, with the second ring of the rolling bearing; and a second sealing gasket made of an elastomer and integrally carried by the second shield, the second gasket comprising one first and one second annular, non contacting, sealing lips designed to cooperate, in use, with the first ring of the rolling bearing and with the second shield, respectively; characterized in that, in combination i)- the first face of the first shield faces the side opposite to the second shield and the first annular non contacting sealing lip extends projecting from a peripheral edge of the second shield facing the side opposite to the first shield and is elastically deformable to bend, in use, towards the first shield when the second shield is struck by a jet of liquid; ii)- the first annular non contacting lip comprises a first portion, which extends radially projecting from the peripheral edge of the second shield, and a second portion defining a peripheral annular edge of the first lip opposite to the peripheral edge of the second shield and shaped as a truncated-cone toroid which extends axially and radially projecting from the first portion and which presents a free end designed, in use, to remain axially away from the first ring of the rolling bearing and come axially into contact with the first ring of the rolling bearing when the first annular lip is bent towards the first shield; iii)- the second portion of the first annular non contacting lip is arranged obliquely with respect to a symmetry axis of the sealing device so as to go away from the symmetry axis towards the free end thereof; iv)- the second annular non contacting lip extends axially projecting from the second shield on the same side as the second portion of the first annular lip and beyond the second portion of the first annular lip; v)- the second annular non contacting lip is arranged obliquely with respect to the symmetry axis so as to extend radially projecting from the second shield towards the first annular non contacting lip to form, towards the first annular non contacting lip, a first annular collecting channel of possible contaminants which pass beyond the first annular lip. i)- the first face of the first shield faces the side opposite to the second shield and the first annular non contacting sealing lip extends projecting from a peripheral edge of the second shield facing the side opposite to the first shield and is elastically deformable to bend, in use, towards the first shield when the second shield is struck by a jet of liquid; ii)- the first annular non contacting lip comprises a first portion, which extends radially projecting from the peripheral edge of the second shield, and a second portion defining a peripheral annular edge of the first lip opposite to the peripheral edge of the second shield and shaped as a truncated-cone toroid which extends axially and radially projecting from the first portion and which presents a free end designed, in use, to remain axially away from the first ring of the rolling bearing and come axially into contact with the first ring of the rolling bearing when the first annular lip is bent towards the first shield; iii)- the second portion of the first annular non contacting lip is arranged obliquely with respect to a symmetry axis of the sealing device so as to go away from the symmetry axis towards the free end thereof; iv)- the second annular non contacting lip extends axially projecting from the second shield on the same side as the second portion of the first annular lip and beyond the second portion of the first annular lip; v)- the second annular non contacting lip is arranged obliquely with respect to the symmetry axis so as to extend radially projecting from the second shield towards the first annular non contacting lip to form, towards the first annular non contacting lip, a first annular collecting channel of possible contaminants which pass beyond the first annular lip.