Since an organic superconductor (TMTSF)₂PF₆ was discovered, many researches have been directed toward the achievement of organic superconductivity. A great number of organic superconductors are now known, most of which are charge-transfer (CT) salts. Electrocrystallization is a powerful tool for the preparation of CT salts, including those with superconductivity. Recently, new types of organic superconductors, such as non-TTF-based superconductors and magnetic superconductors with the field-induced superconductivity and with superconductor-insulator transitions, have been developed.