To solve such a problem of the conventional production method that activity of a catalyst is not always satisfied fully.

A method for producing an aromatic polymer comprises a step of mixing an aromatic monomer shown by formula (A): X¹-Ar¹-X¹ (wherein X¹ is a group shown by one of formulae (1) to (6)) with another aromatic monomer shown by formula (B): X²-Ar²-X² in the presence of a base, a palladium compound, trialkyl phosphine having at least one cyclopentyl group, and an aprotic organic solvent.