In this work, the polyvinyl alcohol (PVA) films composited with decatungstomolybdovanadogermanic heteropoly acid (HPA) were prepared. Infrared (IR) spectra revealed that the Keggin structure characteristic of the GeW10MoVO405- anion was present in PVA films. At room temperature (20 degrees C), the conductivity of the samples of different HPA content increased from 3.16 x 10(-3) to 1.22 x 10(-2) S cm(-1). The results indicated that they are new kind of excellent high-proton conductor. (c) 2005 Elsevier B.V. All rights reserved.