Vanadium alloys are planned for use as structural materials in fusion reactor blankets. To confirm the applicability of these alloys in fusion reactors hydrogen isotope mass transfer and inventory of vanadium alloys must be understood. In the present work, results obtained by performing experiments on hydrogen permeability through vanadium alloy VCr4Ti4 with different surface element compositions of the sample are presented and discussed. Changes of surface element composition were registered by means of Auger Electron Spectroscopy (AES). Experiments were carried out in the temperature range from 573 to 873 K, at input pressures of hydrogen from 102 to 103 Pa. The differential variant of steady state technique with the registration of gas quantity permeated through sample by means of mass-spectrometer was used in these experiments. Parameters of hydrogen permeation through the vanadium alloy at different surface element compositions of the sample were determined. Experiments have shown that the concentration of nonmetallic impurities sulfur/carbon on the surface has a strong influence on the hydrogen permeability through the vanadium alloy (VCr4Ti4).