A method for producing a propylene-based copolymer comprising polymerizing propylene and at least one monomer selected from α-olefins excluding propylene and polyenes, in the presence of a catalyst for olefin polymerization which comprises: (a-2) a bridged metallocene compound represented by the following Formula, (b) at least one compound selected from: (b-1) an organoaluminum oxy compound, (b-2) a compound which reacts with the bridged metallocene compound (a-2) to form an ion pair, and (b-3) an organoaluminum compound; wherein in Formula, R 1, R 2, R 3 and R 4 are each a hydrogen atom; R 5, R 8, R 9 and R 12, which are identical to each other, are each an atom or a group selected from a hydrogen atom, a hydrocarbon group and a silicon-containing group; R 6 and R 11 are the same atoms or same groups selected from a hydrogen atom, a hydrocarbon group and a silicon-containing group; R 7 and R 10 are the same atoms or same groups selected from a hydrogen atom, a hydrocarbon group and a silicon-containing group; all of R 6, R 7, R 10 and R 11 cannot be simultaneously hydrogen atoms; among R 5 to R 12, adjacent groups may be linked to each other to form a ring; R 13 and R 14, which are identical to each other, are each selected from an aryl group having 11 to 18 carbon atoms, a chloroaryl group having 6 to 20 carbon atoms, a chloroalkylaryl group having 7 to 40 carbon atoms, a bromoaryl group having 6 to 20 carbon atoms, a bromoalkylaryl group having 7 to 40 carbon atoms, an iodoaryl group having 6 to 20 carbon atoms, an iodoalkylaryl group having 7 to 40 carbon atoms, and a fluoroalkylaryl group having 7 to 40 carbon atoms; M is Ti, Zr or Hf; Y is carbon or silicon; Q is selected from a halogen, a hydrocarbon group, a neutral, conjugated or non-conjugated diene having 10 or fewer carbon atoms, an anion ligand, and a neutral ligand capable of coordination with a lone electron pair, in identical or different combinations; and j is an integer from 1 to 4. (a-2) a bridged metallocene compound represented by the following Formula, (b) at least one compound selected from: (b-1) an organoaluminum oxy compound, (b-2) a compound which reacts with the bridged metallocene compound (a-2) to form an ion pair, and (b-3) an organoaluminum compound; (b-1) an organoaluminum oxy compound, (b-2) a compound which reacts with the bridged metallocene compound (a-2) to form an ion pair, and (b-3) an organoaluminum compound; R 5, R 8, R 9 and R 12, which are identical to each other, are each an atom or a group selected from a hydrogen atom, a hydrocarbon group and a silicon-containing group; R 6 and R 11 are the same atoms or same groups selected from a hydrogen atom, a hydrocarbon group and a silicon-containing group; R 7 and R 10 are the same atoms or same groups selected from a hydrogen atom, a hydrocarbon group and a silicon-containing group; all of R 6, R 7, R 10 and R 11 cannot be simultaneously hydrogen atoms; among R 5 to R 12, adjacent groups may be linked to each other to form a ring; R 13 and R 14, which are identical to each other, are each selected from an aryl group having 11 to 18 carbon atoms, a chloroaryl group having 6 to 20 carbon atoms, a chloroalkylaryl group having 7 to 40 carbon atoms, a bromoaryl group having 6 to 20 carbon atoms, a bromoalkylaryl group having 7 to 40 carbon atoms, an iodoaryl group having 6 to 20 carbon atoms, an iodoalkylaryl group having 7 to 40 carbon atoms, and a fluoroalkylaryl group having 7 to 40 carbon atoms; M is Ti, Zr or Hf; Y is carbon or silicon; Q is selected from a halogen, a hydrocarbon group, a neutral, conjugated or non-conjugated diene having 10 or fewer carbon atoms, an anion ligand, and a neutral ligand capable of coordination with a lone electron pair, in identical or different combinations; and j is an integer from 1 to 4.