A method for producing a film-like product, comprising: forming a coating film on a substrate by coating the substrate with a coating liquid containing in a solvent a π-electron conjugated compound precursor represented by A- m, and eliminating an eliminated component represented by General Formula to form a π-electron conjugated compound represented by A- m in the coating film, wherein in A- m and A- m, A represents a π-electron conjugated substituent, B represents a solvent-soluble substituent containing a structure represented by General Formula as at least a partial structure, and m is a natural number, wherein the solvent-soluble substituent represented by B is linked via a covalent bond with the π-electron conjugated substituent represented by A where the covalent bond is formed between an atom present on Q 1 to Q 6 and an atom present on the π -electron conjugated substituent represented by A or the solvent-soluble substituent represented by B is ring-fused with the π-electron conjugated substituent represented by A via atoms present on the π-electron conjugated substituent represented by A, and C represents a substituent containing a structure represented by General Formula (Ia) as at least a partial structure, and wherein in General Formulas, (Ia) and, X and Y each represent a hydrogen atom, a substituted or unsubstituted ether group having 1 to 38 carbon atoms or a substituted or unsubstituted acyloxy group having 1 to 38 carbon atoms, where one of X and Y is the ether or acyloxy group and the other is the hydrogen atom; Q 2 to Q 5 each represent a hydrogen atom or a monovalent organic group; Q 1 and Q 6 each represent a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heteroaryl group; and among the monovalent organic groups represented by Q 1 to Q 6, adjacent monovalent organic groups may be linked together to form a ring, and wherein the monovalent organic group is any one of an alkyl group, an alkenyl group, an alkynyl group, an aryl group and a heteroaryl group, wherein the heteroaryl group is selected from a thiophene ring, a pyridine ring, a pyrazine ring, a pyrimidine ring, a triazine ring, a pyrrol ring, a pyrazole ring, an imidaziole ring, a triazole ring, an oxazole ring, a thiazole ring and a furan ring. forming a coating film on a substrate by coating the substrate with a coating liquid containing in a solvent a π-electron conjugated compound precursor represented by A- m, and eliminating an eliminated component represented by General Formula to form a π-electron conjugated compound represented by A- m in the coating film, wherein in A- m and A- m, A represents a π-electron conjugated substituent, B represents a solvent-soluble substituent containing a structure represented by General Formula as at least a partial structure, and m is a natural number, wherein the solvent-soluble substituent represented by B is linked via a covalent bond with the π-electron conjugated substituent represented by A where the covalent bond is formed between an atom present on Q 1 to Q 6 and an atom present on the π -electron conjugated substituent represented by A or the solvent-soluble substituent represented by B is ring-fused with the π-electron conjugated substituent represented by A via atoms present on the π-electron conjugated substituent represented by A, and C represents a substituent containing a structure represented by General Formula (Ia) as at least a partial structure, and wherein in General Formulas, (Ia) and, X and Y each represent a hydrogen atom, a substituted or unsubstituted ether group having 1 to 38 carbon atoms or a substituted or unsubstituted acyloxy group having 1 to 38 carbon atoms, where one of X and Y is the ether or acyloxy group and the other is the hydrogen atom; Q 2 to Q 5 each represent a hydrogen atom or a monovalent organic group; Q 1 and Q 6 each represent a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group or a heteroaryl group; and among the monovalent organic groups represented by Q 1 to Q 6, adjacent monovalent organic groups may be linked together to form a ring, and wherein the monovalent organic group is any one of an alkyl group, an alkenyl group, an alkynyl group, an aryl group and a heteroaryl group, wherein the heteroaryl group is selected from a thiophene ring, a pyridine ring, a pyrazine ring, a pyrimidine ring, a triazine ring, a pyrrol ring, a pyrazole ring, an imidaziole ring, a triazole ring, an oxazole ring, a thiazole ring and a furan ring.