Plastic spectacle lens

To provide a plastic ophthalmic lens having a high refractive index and a high Abbe's number, good transparency, heat resistance, mechanical strength and impact resistance. Plastic spectacle lenses provided by ring-containing group compound (A), polythiol compound (b) and the polyisocyanate compound (c) polymerizing prepared, wherein the polythiol compound (b) to the polyisocyanate polymer (c) ratio of -SH and -NCO molar amount calculated on the basis, in the sulfur-free polyisocyanate compound (c