A polymer material comprising a segment of an alternating copolymer of a structural unit represented by Formula and having a glass transition temperature of greater than or equal to 50°C and less than or equal to 250°C: wherein, in Formula , X is at least one selected from groups represented by Formula (2-I) to Formula (2-L) and Y is a substituted or unsubstituted divalent aromatic hydrocarbon group having 6 to 60 ring-forming carbon atoms, or a substituted or unsubstituted divalent aromatic heterocyclic group having 3 to 60 ring-forming atoms, wherein, in Formula (2-I) to Formula (2-L), Ar 1 is a substituted or unsubstituted cyclic C6 to C60 trivalent aromatic hydrocarbon group or a substituted or unsubstituted trivalent aromatic heterocyclic group having 3 to 60 ring-forming atoms, Ar 2 and Ar 3 are independently a substituted or unsubstituted monovalent aromatic hydrocarbon group having ring-forming 6 to 60 carbon atoms or a substituted or unsubstituted monovalent aromatic heterocyclic group having 3 to 60 ring-forming atoms, L 1 and L 2 are independently a single bond, a substituted or unsubstituted divalent aromatic hydrocarbon group having 6 to 60 ring-forming carbon atoms, or a substituted or unsubstituted divalent aromatic heterocyclic group having 3 to 60 ring-forming atoms, * is a binding portion forming a main chain, in Formula (2-J) to Formula (2-L), R 1 and R 2 are independently a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted monovalent aromatic hydrocarbon group having ring-forming 6 to 60 carbon atoms, or a substituted or unsubstituted monovalent aromatic heterocyclic group having 3 to 60 ring-forming atoms, wherein R 1 and R 2 are combined with each other to form a ring, a is an integer of 1 to 4, and b is an integer of 1 to 3. a segment of an alternating copolymer of a structural unit represented by Formula and having a glass transition temperature of greater than or equal to 50°C and less than or equal to 250°C: wherein, in Formula , X is at least one selected from groups represented by Formula (2-I) to Formula (2-L) and Y is a substituted or unsubstituted divalent aromatic hydrocarbon group having 6 to 60 ring-forming carbon atoms, or a substituted or unsubstituted divalent aromatic heterocyclic group having 3 to 60 ring-forming atoms, wherein, in Formula (2-I) to Formula (2-L), Ar 1 is a substituted or unsubstituted cyclic C6 to C60 trivalent aromatic hydrocarbon group or a substituted or unsubstituted trivalent aromatic heterocyclic group having 3 to 60 ring-forming atoms, Ar 2 and Ar 3 are independently a substituted or unsubstituted monovalent aromatic hydrocarbon group having ring-forming 6 to 60 carbon atoms or a substituted or unsubstituted monovalent aromatic heterocyclic group having 3 to 60 ring-forming atoms, L 1 and L 2 are independently a single bond, a substituted or unsubstituted divalent aromatic hydrocarbon group having 6 to 60 ring-forming carbon atoms, or a substituted or unsubstituted divalent aromatic heterocyclic group having 3 to 60 ring-forming atoms, * is a binding portion forming a main chain, in Formula (2-J) to Formula (2-L), R 1 and R 2 are independently a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted monovalent aromatic hydrocarbon group having ring-forming 6 to 60 carbon atoms, or a substituted or unsubstituted monovalent aromatic heterocyclic group having 3 to 60 ring-forming atoms, wherein R 1 and R 2 are combined with each other to form a ring, a is an integer of 1 to 4, and b is an integer of 1 to 3. <EOS>