Hydrogen-permeable membrane, manufacturing method of the same, and hydrogen gas separator using the same

A hydrogen-permeable membrane (234) includes a metal base layer (LA) containing a Group VA element, two metal middle layers (LB1, LB2) which are formed on both of the two sides of the metal base layer (LA) and contains an element selected from Ni and CO, and two metal coating layers (LC1, LC2) formed on the side of the two metal middle layers, on which the metal base layer is not formed, and containing Pd.