A new electrode material of ferric aquapentacyanoferrate (FAPCF) film was fabricated. Its structure, optical, electrochemical and electrochromic properties were studied. In comparison with Prussian blue FAPCF exhibits a moderate contraction of the cubic lattice and a different texture of film. The maximum of optical absorption is shifted by 100 nm towards the long wavelength region for FAPCF relatively to Prussian blue.