Studies are shown that tantalum and niobium have different kinetics of hydrogen uptake. Tantalum, in contrast to niobium, is able absorb actively hydrogen at room temperature, reaching a hydrogen capacity at the level of TaN$_{1.9}$. Active absorption of hydrogen by niobium is observed only at heating to temperatures of 400–500°C, reaching the hydrogen capacity of NbH$_{1.23}$. The kinetics of hydrogen evolution from both hydrogen-saturated metals is similar, the process takes place at room temperature, but in different pressure conditions.