A porous structure (1) provided with a pattern that is composed of a conductive polymer, which comprises a porous body (2) and a pattern (3) that is composed of a conductive polymer and arranged on the porous body (2). The porous body (2) is preferably a gel, and a dopant may be added to the pattern (3) that is composed of a conductive polymer. If an agarose gel is used as the gel (2) and a PEDOT electrode (3A) is used as the pattern (3) that is composed of a conductive polymer in the porous structure (1) which is provided with the pattern (3) that is composed of a conductive polymer, the porous structure (1) can be used as an electrode for cell stimulation. The porous structure (1) provided with the pattern (3) that is composed of a conductive polymer can be produced by an electropolymerization method.