Tantalum solid electrolytic capacitors were fabricated by dip coating process into the electrolyte solutions which mixed polyaniline powder with dopants[camphorsulfonic acid(CSA) and dodecylbenzenesulfonic acid(DBSA)] respectively with the mole ratio of 1:2. This mixed powders were dissolved in solvents trifluoroacetic acid and chloroform respectively to prepare the polymer electrolyte. Tantalum electrolytic capacitors prepared with polyaniline solution dissolved in protic solvent such as trifluoroacetic acid showed a high capacitance and a low tanδ. Polyaniline electrolyte solution containing surfactant was prepared by adding N-lauryl-β-aminopropionic acid and sorbitan monooleate to polyaniline solution prepared previously. Polyaniline electrolyte solution containing N-lauryl-β-aminopropionic acid surfactant showed a high capacitance(98 μF) and a low tanδ(3%). In the case of using polyaniline dissolved in the protic solvents, a good affinity was obtained due to a hydrogen bond between hydrogens in protic solvent (electrolytic solution) and oxygens in tantalum oxide. In the case of using surfactants, improved capacitor characteristics was also obtained due to a increase of the affinity between surfactant having aprotic chains and hydrogens and aprotic polyaniline chain and a increase of impregnation rate of the polyaniline solution induced a hydrogen bonding between hydrogen in the surfactant and surface of the tantalum oxide.