A copolycarbonate comprising: i) a repeating unit represented by the following Chemical Formula 1, ii) a repeating unit represented by the following Chemical Formula 2, and iii) a repeating unit represented by the following Chemical Formula 3 and a repeating unit represented by the following Chemical Formula 4, wherein the copolycarbonate has a weight average molecular weight of 1,000 to 100,000, measured as indicated in the description: in the ChemicalFormula 1, R 1, R 2, R 3 and R 4 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen, and Z 1 is C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2, or CO, in the Chemical Formula 2, R 5, R 6, R 7, R 8, R 9, R 10, R 11 and R 12 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen, and Z 2 and Z 3 are each independently C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2, or CO, and A is C 1-15 alkylene, in the ChemicalFormula 3, each of X 1 is independently C 1-10 alkylene, each of R 13 is independently hydrogen; C 1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C 1-10 alkoxy, or C 6-20 aryl; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and n is an integer of 10 to 200, in the ChemicalFormula 4, each of X 2 is independently C 1-10 alkylene, each of Y 1 is independently hydrogen, C 1-6 alkyl, halogen, hydroxy, C 1-6 alkoxy, or C 6-20 aryl, each of R 14 is independently hydrogen; C 1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C 1-10 alkoxy, or C 6-20 aryl; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and m is an integer of 10 to 200, i) a repeating unit represented by the following Chemical Formula 1, ii) a repeating unit represented by the following Chemical Formula 2, and iii) a repeating unit represented by the following Chemical Formula 3 and a repeating unit represented by the following Chemical Formula 4, wherein the copolycarbonate has a weight average molecular weight of 1,000 to 100,000, measured as indicated in the description: in the ChemicalFormula 1, R 1, R 2, R 3 and R 4 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen, and Z 1 is C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2, or CO, in the Chemical Formula 2, R 5, R 6, R 7, R 8, R 9, R 10, R 11 and R 12 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen, and Z 2 and Z 3 are each independently C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2, or CO, and A is C 1-15 alkylene, in the ChemicalFormula 3, each of X 1 is independently C 1-10 alkylene, each of R 13 is independently hydrogen; C 1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C 1-10 alkoxy, or C 6-20 aryl; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and n is an integer of 10 to 200, in the ChemicalFormula 4, each of X 2 is independently C 1-10 alkylene, each of Y 1 is independently hydrogen, C 1-6 alkyl, halogen, hydroxy, C 1-6 alkoxy, or C 6-20 aryl, each of R 14 is independently hydrogen; C 1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C 1-10 alkoxy, or C 6-20 aryl; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and m is an integer of 10 to 200, R 1, R 2, R 3 and R 4 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen, and Z 1 is C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2, or CO, R 5, R 6, R 7, R 8, R 9, R 10, R 11 and R 12 are each independently hydrogen, C 1-10 alkyl, C 1-10 alkoxy, or halogen, and Z 2 and Z 3 are each independently C 1-10 alkylene unsubstituted or substituted with phenyl, C 3-15 cycloalkylene unsubstituted or substituted with C 1-10 alkyl, O, S, SO, SO 2, or CO, and A is C 1-15 alkylene, each of X 1 is independently C 1-10 alkylene, each of R 13 is independently hydrogen; C 1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C 1-10 alkoxy, or C 6-20 aryl; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and n is an integer of 10 to 200, each of X 2 is independently C 1-10 alkylene, each of Y 1 is independently hydrogen, C 1-6 alkyl, halogen, hydroxy, C 1-6 alkoxy, or C 6-20 aryl, each of R 14 is independently hydrogen; C 1-15 alkyl unsubstituted or substituted with oxiranyl, oxiranyl-substituted C 1-10 alkoxy, or C 6-20 aryl; halogen; C 1-10 alkoxy; allyl; C 1-10 haloalkyl; or C 6-20 aryl, and m is an integer of 10 to 200,