A copolycarbonate resin composition comprising: a copolycarbonate resin including an aromatic polycarbonate-based first repeating unit and one or more aromatic polycarbonate-based second repeating unit having at least one siloxane bond; and a polysiloxane polymer containing a hydrocarbon-based functional group having 2 or more carbon atoms, wherein the one or more aromatic polycarbonate-based second repeating unit having at least one siloxane bond include a repeating unit represented by the following Chemical Formula 2, and a repeating unit represented by the following Chemical Formula 3: wherein X 1 is C 1-10 alkylene, R 5 is 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 n1 is an integer of 10 to 200, wherein X 2 is C 1-10 alkylene, Y 1 is hydrogen, C 1-6 alkyl, halogen, hydroxy, C 1-6 alkoxy or C 6-20 aryl, R 6 is 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 n2 is an integer of 10 to 200. a copolycarbonate resin including an aromatic polycarbonate-based first repeating unit and one or more aromatic polycarbonate-based second repeating unit having at least one siloxane bond; and a polysiloxane polymer containing a hydrocarbon-based functional group having 2 or more carbon atoms, wherein the one or more aromatic polycarbonate-based second repeating unit having at least one siloxane bond include a repeating unit represented by the following Chemical Formula 2, and a repeating unit represented by the following Chemical Formula 3: wherein X 1 is C 1-10 alkylene, R 5 is 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 n1 is an integer of 10 to 200, wherein X 2 is C 1-10 alkylene, Y 1 is hydrogen, C 1-6 alkyl, halogen, hydroxy, C 1-6 alkoxy or C 6-20 aryl, R 6 is 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 n2 is an integer of 10 to 200. X 1 is C 1-10 alkylene, R 5 is 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 n1 is an integer of 10 to 200, wherein X 2 is C 1-10 alkylene, Y 1 is hydrogen, C 1-6 alkyl, halogen, hydroxy, C 1-6 alkoxy or C 6-20 aryl, R 6 is 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 n2 is an integer of 10 to 200. X 2 is C 1-10 alkylene, Y 1 is hydrogen, C 1-6 alkyl, halogen, hydroxy, C 1-6 alkoxy or C 6-20 aryl, R 6 is 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 n2 is an integer of 10 to 200. <EOS>