The modification of electrodeposited polyaniline film by subsequent electrodeposition of diamino-methylbenzoate leads to a new material of interesting electrochemical, electrical and spectroscopic properties. The electronically conductive parent polymer can be transformed into a redox polymer, however, the electrochemical behaviour, the colour and the conductivity of the polymer during the modification procedure can be easily regulated, therefore, the required properties can be finely tuned. The formation and the properties of the new polymeric films were studied by electrochemical microgravimetric and spectroelectrochemical techniques.