The present invention relates to (i) a method of producing a conductive polymer, comprising polymerizing at least one of compounds (A1) represented by the formula (1) disclosed in the specification in the presence of a compound (B) having sulfo group; (ii) a method of producing a conductive polymer, comprising polymerizing at least one compound selected from a group consisting of at least one compound (A2) represented by the formula (2); and (iii) a method of producing a conductive polymer, comprising copolymerizing at least one compound (A1) and at least one compound selected from a group consisting of at least one compound (A2). The method of the present invention is a method for producing a one-liquid type conductive polymer in which it is possible to easily adjust the solvent affinity, the solubility, and other such aspects of performance according to the purpose.