The object of the invention is a sliding ring used in mechanical non-contact face seals. A sliding ring according to the invention is provided with grooves (1) on its faying face (5) which extend to the outer or to the inner peripheral surface, so that the faying face (s) has a recessed surface (Fv) and a non-recessed surface (F), whose relation Fv/F is included in the range from 0.25 to 0.50 and the grooves (1) situated on the recessed surface (Fv) are of the shape of a bell of an inclination angle (α) from 5° to 15° and an inclination angle (β) from 5° to 45°, while the relation of the base width (B) of the groove (1) to the top width (A) of the groove (1) is from 2 to 6, wherein all the grooves (1) are connected at their base (B) by a thin, ring-shaped groove (m) whose width against the height (Io) of the groove (1) falls into the range between 0.08 and 0.25.