An aromatic polythiol compound selected from the group consisting of: (a) an aromatic polythiol compound prepared by reacting a divinylbenzene compound represented by Formula 1 below and a bi- or higher-functional aliphatic polythiol: wherein the bi- or higher-functional aliphatic polythiol is at least one selected from the group consisting of glyceryl dithioglycolate, ethoxylated trimethylolpropane tri(3-mercaptopropionate), tris[2-(3-mercaptopropionyloxy)ethyl]isocyanurate, dipentaerythritol hexa(3-mercaptopropionate), and 5,9-dimercaptomethyl-1,13-dimercapto-3,7,11-trithiatridecane; (b) an aromatic polythiol compound represented by Formula 2 or 3 below: wherein, R 1 and R 1 ' are each independently a sulfur atom, an oxygen atom, O=S=O, CX 1 Y 1, or C=CX 2 Y 2, wherein X 1, Y 1, X 2, and Y 2 are each independently a hydrogen atom, a halogen atom, C 1-6 alkyl, C 6-10 aryl, C 3-6 cycloalkyl, or C 1-6 alkoxy, and wherein X 1 and Y 1, and X 2 and Y 2, may combine with each other to form a C 3-10 ring and may be substituted with at least one selected from the group consisting of a halogen atom, C 1-6 alkyl, and hydroxy, R 2 is each independently an oxygen atom or a sulfur atom, and R 3 is each independently a hydrogen atom, a halogen atom, C 1-10 alkyl, or C 6-10 aryl; (c) an aromatic polythiol compound represented by Formula 10 below: and (d) an aromatic polythiol compound represented by any one of Formulae 14 to 16 below: wherein, R 1 is each independently a sulfur atom or an oxygen atom, and R 2 is each independently a hydrogen atom, a halogen atom, C 1-10 alkyl, or C 6-10 aryl. (a) an aromatic polythiol compound prepared by reacting a divinylbenzene compound represented by Formula 1 below and a bi- or higher-functional aliphatic polythiol: wherein the bi- or higher-functional aliphatic polythiol is at least one selected from the group consisting of glyceryl dithioglycolate, ethoxylated trimethylolpropane tri(3-mercaptopropionate), tris[2-(3-mercaptopropionyloxy)ethyl]isocyanurate, dipentaerythritol hexa(3-mercaptopropionate), and 5,9-dimercaptomethyl-1,13-dimercapto-3,7,11-trithiatridecane; (b) an aromatic polythiol compound represented by Formula 2 or 3 below: wherein, R 1 and R 1 ' are each independently a sulfur atom, an oxygen atom, O=S=O, CX 1 Y 1, or C=CX 2 Y 2, wherein X 1, Y 1, X 2, and Y 2 are each independently a hydrogen atom, a halogen atom, C 1-6 alkyl, C 6-10 aryl, C 3-6 cycloalkyl, or C 1-6 alkoxy, and wherein X 1 and Y 1, and X 2 and Y 2, may combine with each other to form a C 3-10 ring and may be substituted with at least one selected from the group consisting of a halogen atom, C 1-6 alkyl, and hydroxy, R 2 is each independently an oxygen atom or a sulfur atom, and R 3 is each independently a hydrogen atom, a halogen atom, C 1-10 alkyl, or C 6-10 aryl; wherein, R 1 and R 1 ' are each independently a sulfur atom, an oxygen atom, O=S=O, CX 1 Y 1, or C=CX 2 Y 2, wherein X 1, Y 1, X 2, and Y 2 are each independently a hydrogen atom, a halogen atom, C 1-6 alkyl, C 6-10 aryl, C 3-6 cycloalkyl, or C 1-6 alkoxy, and wherein X 1 and Y 1, and X 2 and Y 2, may combine with each other to form a C 3-10 ring and may be substituted with at least one selected from the group consisting of a halogen atom, C 1-6 alkyl, and hydroxy, R 2 is each independently an oxygen atom or a sulfur atom, and R 3 is each independently a hydrogen atom, a halogen atom, C 1-10 alkyl, or C 6-10 aryl; (c) an aromatic polythiol compound represented by Formula 10 below: and (d) an aromatic polythiol compound represented by any one of Formulae 14 to 16 below: wherein, R 1 is each independently a sulfur atom or an oxygen atom, and R 2 is each independently a hydrogen atom, a halogen atom, C 1-10 alkyl, or C 6-10 aryl. R 1 is each independently a sulfur atom or an oxygen atom, and R 2 is each independently a hydrogen atom, a halogen atom, C 1-10 alkyl, or C 6-10 aryl.