A polymerizable composition for optical materials, comprising: (A) a compound represented by following General Formula ; and (B) a polythiol compound wherein, in Formula , A 1 represents an optionally substituted alkylene group of 1 to 4 carbon atoms; n is an integer of 0 or 1; R 1 represents an isocyanate group or an isothiocyanate group; R 2 represents a hydrogen atom, an alkyl group of 1 to 4 carbon atoms or a group represented by the following formula: wherein, in the formula, A 2 and R 4 have the same meaning as A 1 and R 1 , respectively, and may be the same as or different from these groups, * represents a coupling hand; and R 3 represents a hydrogen atom or a methyl group; and wherein the polythiol compound (B) is at least one selected from the group consisting of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 1,1,3,3-tetrakis(mercaptomethylthio)propane, 4,6-bis(mercaptomethylthio)-1,3-dithiane, 2-(2,2-bis(mercaptomethylthio)ethyl)-1,3-dithiethane, 1,1,2,2-tetrakis(mercaptomethylthio)ethane, and 3-mercaptomethyl-1,5-dimercapto-2,4-dithiapentane. (A) a compound represented by following General Formula ; and (B) a polythiol compound wherein, in Formula , A 1 represents an optionally substituted alkylene group of 1 to 4 carbon atoms; n is an integer of 0 or 1; R 1 represents an isocyanate group or an isothiocyanate group; R 2 represents a hydrogen atom, an alkyl group of 1 to 4 carbon atoms or a group represented by the following formula: wherein, in the formula, A 2 and R 4 have the same meaning as A 1 and R 1 , respectively, and may be the same as or different from these groups, * represents a coupling hand; and R 3 represents a hydrogen atom or a methyl group; and wherein the polythiol compound (B) is at least one selected from the group consisting of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 1,1,3,3-tetrakis(mercaptomethylthio)propane, 4,6-bis(mercaptomethylthio)-1,3-dithiane, 2-(2,2-bis(mercaptomethylthio)ethyl)-1,3-dithiethane, 1,1,2,2-tetrakis(mercaptomethylthio)ethane, and 3-mercaptomethyl-1,5-dimercapto-2,4-dithiapentane. A 1 represents an optionally substituted alkylene group of 1 to 4 carbon atoms; n is an integer of 0 or 1; R 1 represents an isocyanate group or an isothiocyanate group; R 2 represents a hydrogen atom, an alkyl group of 1 to 4 carbon atoms or a group represented by the following formula: wherein, in the formula, A 2 and R 4 have the same meaning as A 1 and R 1 , respectively, and may be the same as or different from these groups, * represents a coupling hand; and R 3 represents a hydrogen atom or a methyl group; and wherein the polythiol compound (B) is at least one selected from the group consisting of 4-mercaptomethyl-1,8-dimercapto-3,6-dithiaoctane, 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 1,1,3,3-tetrakis(mercaptomethylthio)propane, 4,6-bis(mercaptomethylthio)-1,3-dithiane, 2-(2,2-bis(mercaptomethylthio)ethyl)-1,3-dithiethane, 1,1,2,2-tetrakis(mercaptomethylthio)ethane, and 3-mercaptomethyl-1,5-dimercapto-2,4-dithiapentane. <EOS>