A polymerizable composition for optical components according to one embodiment of the present disclosure includes a polyiso(thio)cyanate compound (A) having one or more aromatic rings in one molecule, a polythiol compound (B) having three or more mercapto groups in one molecule, and an acidic phosphate ester compound (C), wherein the content of the acidic phosphate ester compound (C) is 0.1 to 3.0 parts by mass with respect to a total amount of 100 parts by mass of the polyiso(thio)cyanate compound (A) and the polythiol compound (B), and wherein the content of a polymerization catalyst is 0.006 parts by mass or less with respect to a total amount of 100 parts by mass of the polyiso(thio)cyanate compound (A) and the polythiol compound (B).