Poly(catechol) was prepared by using peroxidase as a catalyst in two types of solvent systems : an aqueous dioxane solution and a reverse micellar solution. Peroxidases derived from two sources, horseradish (HRP) and soybean (SBP), were employed as catalyst. The structure of the prepared polymer was elucidated by infrared analysis. Enzymatically prepared film of poly(catechol) at a Pt electrode was subjected to cyclic voltammetric studies in aqueous HCl medium and phosphate buffer pH 6.5. Thermal studies of the polymer,were performed by thermogravimetric analysis. The iodine-labelled polymers showed low electrical conductivity in the range of 10(-6) to 10(-9) S cm(-1). The magnetic susceptibility and surface morphological property of the polymer were also studied.