Oxygen electroreduction has been investigated in 0.1 MNa(2)SO(4) aqueous solution on an electrode covered by a polypyrrole (PPy) layer. The dependence of the reduction rate on the thickness of the PPy film has been established. The electrocatalytic properties of PPy in the studied electrode process have been confirmed. It was concluded that the nickel electrode covered with a PPy layer can be employed for water deoxygenation.