An anti-forgery color conversion film comprising: a photonic crystal structure whose color is converted by an external stimulus, wherein the photonic crystal structure comprises: a first refractive index layer including a first polymer exhibiting a first refractive index; and a second refractive index layer which is alternately laminated with the first refractive index layer and includes a second polymer exhibiting a second refractive index, wherein the first refractive index and the second refractive index are different from each other, and one of the first polymer and the second polymer is a copolymer including a repeating unit represented by Formula 1 below: wherein R 1 and R 2 are each independently hydrogen or C 1-3 alkyl, R 3 is represented by Formula 2 or 3 below, R 4 is O or NH, R 5 is benzoylphenyl, wherein the benzoylphenyl is unsubstituted, or substituted with one to four substituents each independently selected from the group consisting of hydroxy, halogen, nitro, C 1-5 alkyl and C 1-5 alkoxy, n and m are each independently an integer of 1 or more, and n + m is 100 to 2,000; wherein R 6 is O or NH, R 7 is H, C 1-10 alkyl, C 1-10 aminoalkyl, C 1-10 fluoroalkyl or and o is an integer of 1 to 10; wherein p is an integer of 1 to 4; wherein the other of the first polymer and the second polymer is a copolymer including a repeating unit represented by Formula 5 below: wherein R 5 to R 6 are each independently hydrogen or C 1-3 alkyl, A 1 and A 2 are each independently a C 6-20 aromatic ring or C 2-20 heteroaromatic ring, R 12 to R 13 are each independently hydroxy, cyano, nitro, amino, halogen, SO 3 H, SO 3 (C 1-5 alkyl), C 1-10 alkyl or C 1-10 alkoxy, a2 to a3 are each independently an integer of 0 to 5, L 3 is O or NH, Y 3 is benzoylphenyl, Y 3 is unsubstituted, or substituted with one to four substituents each independently selected from the group consisting of hydroxy, halogen, nitro, C 1-5 alkyl and C 1-5 alkoxy, n" and m" are each independently an integer of 1 or more, and n" + m" is 100 to 2,000. wherein the photonic crystal structure comprises: a first refractive index layer including a first polymer exhibiting a first refractive index; and a second refractive index layer which is alternately laminated with the first refractive index layer and includes a second polymer exhibiting a second refractive index, wherein the first refractive index and the second refractive index are different from each other, and one of the first polymer and the second polymer is a copolymer including a repeating unit represented by Formula 1 below: wherein R 1 and R 2 are each independently hydrogen or C 1-3 alkyl, R 3 is represented by Formula 2 or 3 below, R 4 is O or NH, R 5 is benzoylphenyl, wherein the benzoylphenyl is unsubstituted, or substituted with one to four substituents each independently selected from the group consisting of hydroxy, halogen, nitro, C 1-5 alkyl and C 1-5 alkoxy, n and m are each independently an integer of 1 or more, and n + m is 100 to 2,000; wherein R 6 is O or NH, R 7 is H, C 1-10 alkyl, C 1-10 aminoalkyl, C 1-10 fluoroalkyl or and o is an integer of 1 to 10; wherein p is an integer of 1 to 4; wherein the other of the first polymer and the second polymer is a copolymer including a repeating unit represented by Formula 5 below: wherein R 5 to R 6 are each independently hydrogen or C 1-3 alkyl, A 1 and A 2 are each independently a C 6-20 aromatic ring or C 2-20 heteroaromatic ring, R 12 to R 13 are each independently hydroxy, cyano, nitro, amino, halogen, SO 3 H, SO 3 (C 1-5 alkyl), C 1-10 alkyl or C 1-10 alkoxy, a2 to a3 are each independently an integer of 0 to 5, L 3 is O or NH, Y 3 is benzoylphenyl, Y 3 is unsubstituted, or substituted with one to four substituents each independently selected from the group consisting of hydroxy, halogen, nitro, C 1-5 alkyl and C 1-5 alkoxy, n" and m" are each independently an integer of 1 or more, and n" + m" is 100 to 2,000.