A polycarbonate resin composition comprising: a first copolycarbonate comprising a repeating unit represented by Chemical Formula 1 below, a repeating unit represented by Chemical Formula 2 below, and a repeating unit represented by Chemical Formula 3 below; and a second copolycarbonate comprising a repeating unit represented by Chemical Formula 1 below and a repeating unit represented by Chemical Formula 4 below: wherein, in Chemical Formula 1, R 1 to R 4 are each independently hydrogen, a C 1-10 alkyl, a C 1-10 alkoxy, or a halogen, and Z 1 is a C 1-10 alkylene unsubstituted or substituted with a phenyl, a C 3-15 cycloalkylene unsubstituted or substituted with a C 1-10 alkyl, O, S, SO, SO 2, or CO; wherein, in Chemical Formula 2, each X 1 is independently a C 1-10 alkylene, each R 5 is independently hydrogen; a C 1-15 alkyl unsubstituted or substituted with an oxiranyl, an oxiranyl-substituted C 1-10 alkoxy, or a C 6-20 aryl; a halogen; a C 1-10 alkoxy; an allyl; a C 1-10 haloalkyl; or a C 6-20 aryl, and n is an integer of 10 to 200, wherein, in Chemical Formula 3, each X 2 is independently a C 1-10 alkylene, each Y 1 is independently hydrogen, a C 1-6 alkyl, a halogen, a hydroxy, a C 1-6 alkoxy, or a C 6-20 aryl, each R 6 is independently hydrogen; a C 1-15 alkyl unsubstituted or substituted with an oxiranyl, an oxiranyl-substituted C 1-10 alkoxy, or a C 6-20 aryl; a halogen; a C 1-10 alkoxy; an allyl; a C 1-10 haloalkyl; or a C 6-20 aryl, and m is an integer of 10 to 200, wherein, in Chemical Formula 4, Z 2 is a C 1-10 alkylene unsubstituted or substituted with a phenyl, a C 3-15 cycloalkylene unsubstituted or substituted with a C 1-10 alkyl, O, S, SO, SO 2, or CO; and I is an integer of 1 to 10. a first copolycarbonate comprising a repeating unit represented by Chemical Formula 1 below, a repeating unit represented by Chemical Formula 2 below, and a repeating unit represented by Chemical Formula 3 below; and a second copolycarbonate comprising a repeating unit represented by Chemical Formula 1 below and a repeating unit represented by Chemical Formula 4 below: wherein, in Chemical Formula 1, R 1 to R 4 are each independently hydrogen, a C 1-10 alkyl, a C 1-10 alkoxy, or a halogen, and Z 1 is a C 1-10 alkylene unsubstituted or substituted with a phenyl, a C 3-15 cycloalkylene unsubstituted or substituted with a C 1-10 alkyl, O, S, SO, SO 2, or CO; R 1 to R 4 are each independently hydrogen, a C 1-10 alkyl, a C 1-10 alkoxy, or a halogen, and Z 1 is a C 1-10 alkylene unsubstituted or substituted with a phenyl, a C 3-15 cycloalkylene unsubstituted or substituted with a C 1-10 alkyl, O, S, SO, SO 2, or CO; each X 1 is independently a C 1-10 alkylene, each R 5 is independently hydrogen; a C 1-15 alkyl unsubstituted or substituted with an oxiranyl, an oxiranyl-substituted C 1-10 alkoxy, or a C 6-20 aryl; a halogen; a C 1-10 alkoxy; an allyl; a C 1-10 haloalkyl; or a C 6-20 aryl, and n is an integer of 10 to 200, each X 2 is independently a C 1-10 alkylene, each Y 1 is independently hydrogen, a C 1-6 alkyl, a halogen, a hydroxy, a C 1-6 alkoxy, or a C 6-20 aryl, each R 6 is independently hydrogen; a C 1-15 alkyl unsubstituted or substituted with an oxiranyl, an oxiranyl-substituted C 1-10 alkoxy, or a C 6-20 aryl; a halogen; a C 1-10 alkoxy; an allyl; a C 1-10 haloalkyl; or a C 6-20 aryl, and m is an integer of 10 to 200, Z 2 is a C 1-10 alkylene unsubstituted or substituted with a phenyl, a C 3-15 cycloalkylene unsubstituted or substituted with a C 1-10 alkyl, O, S, SO, SO 2, or CO; and I is an integer of 1 to 10.