A contacts material for a vacuum valve including an arc-proof constituent including at least one selected from the group of chromium, titanium, zirconium, vanadium and yttrium, an auxiliary constituent including at least one selected from the group of tantalum, niobium, tungsten and molybdenum and a conductive constituent including at least one selected from the group of copper and silver. In the contacts material, an amount of the arc-proof constituent is from 10% to 70% by volume, a total amount of the arc-proof constituent together with the auxiliary constituent is not more than 75% by volume and an amount of the conductive constituent is the balance.