Experimental data on hydrogen permeability through membrane alloys V85Ni15, V90Ti10, and V90Co10 ( at %) are presented. Hydrogen permeability tests have been carried out in the temperature range of 623-873 K at pressures of similar to 4.5, 14, and 30 kPa. Results of X-ray diffraction analysis of samples are presented. Microstructure of the membrane alloys has been investigated before and after hydrogen permeability tests.