A hydrogen storing system for a fuel cell vehicle is provided to improve volume storage density and hydrogen storage capacity and to ensure a structure which is advantageous for packaging by using metallic alloy powder for hydrogen storage and storage alloy releasing hydrogen. A hydrogen storing system for a fuel cell vehicle comprises an external space filled with first storage alloy power releasing hydrogen at a high temperature; an internal space filled with second storage alloy power releasing hydrogen with only heat generated from the fuel cell stack; metal filter which is arranged between internal and external space; a second heat exchange tube which is arranged along the longitudinal direction of the internal space; and an independent heat exchange loop(200).
