Polypyrrole (PPy) hybrid material doped vanadotungstogermanic triheteropoly acid was prepared for the first time. Their SEM, IR and XRD patterns confirm the existence of Keggin anions and form the space reticular structure. The material exhibits excellent proton conduction, its proton conductivity is 1.24 x 10(-2) S cm(-1) at room temperature (18 degreesC). (C) 2002 Elsevier Science B.V. All rights reserved.