PLASTIC LENS

An object of the present invention is to provide a plastic lens that has a hard coat layer exhibiting high surface hardness and scratch resistance and that suppresses occurrence of interference fringes. The present invention provides a plastic lens containing a plastic lens substrate; and a hard coat layer formed on at least one surface of the plastic lens substrate, wherein the plastic lens substrate contains at least one resin selected from the group consisting of a polyamide-based resin, a polycarbonate-based resin, an acrylic resin, an allyl-based resin, a urethane-based resin, and a thiourethane-based resin, and the hard coat layer is a cured product of a curable composition containing a polyorganosilsesquioxane described below, a content of the polyorganosilsesquioxane being 80 wt.% or greater relative to the total solid content (100 wt.%) of the curable composition, the polyorganosilsesquioxane containing a constituent unit represented by Formula (1), the polyorganosilsesquioxane having a molar ratio of a constituent units of Formula (I) to constituent units of Formula (II) being from 5 to 500, the polyorganosilsesquioxane having a ratio of the constituent unit of Formula (1) and a constituent unit of Formula (4) relative to the total amount of siloxane constituent units being from 55 to 100 mol%, the polyorganosilsesquioxane having a number average molecular weight being from 1000 to 50000, and the polyorganosilsesquioxane having a molecular weight dispersity being from 1.0 to 4.0.[Chem. 1] [R1SiO3/2] (1)[Chem. 2] [RaSiO3/2] (I)[Chem. 3] [RbSiO2/2(ORc)] (II)[Chem. 4] [R1SiO2/2(ORc)] (4)