A liquid crystal composition including a first liquid crystal monomer, and a second liquid crystal monomer, wherein the ratio of the first liquid crystal monomer is 5 wt % to 10 wt % and the ratio of the second liquid crystal monomer is 90 wt % to 95 wt %, based on the total weight of the first liquid crystal monomer and the second liquid crystal monomer. The first liquid crystal monomer is selected from the group consisting of tetra-cyclic compounds represented by formula 1 to formula 6: wherein R is C3-C12 alkyl group, X is —COO—, —C≡C—, or —N═N—, and Y is —CN. The second liquid crystal monomer includes a bicyclic structure or a tricyclic structure.