PURPOSE: To develop a structural body of hydrogen occlusion alloy which is not disintegrated by repeat of occlusion and discharge of H2 and is not lowered in occlusion capacity, by calcining the structural body wherein ultraparticulate hydrogen occlusion alloy is deposited on the surface of an air-permeable base plate in the inert gas atmosphere.

CONSTITUTION: After exhausting and vacuuming the inside of a vacuum tank 1 with a vacuum pump 15, it is made to the Ar-H2 atmosphere and a base material of LaNi5 is made ultraparticulate by performing arc discharge between a tungsten electrode 3 and the base material 5 of hydrogen occlusion alloy LaNi5. The ultrafine LaNi5 particles are carried with carrier gas G1 and passed through a suction cover 8 and a suction nozzle 9 and deposited on the surface of a base plate 21 arranged in a filter 12. The base plate 21 is an air-permeable base plate formed by solidifying Cu powder of about 0.2mm size with 'Teflon(R)' binder. The base plate 21 deposited with ultrafine LaNi5 particles is drawn out from the vacuum tank and Cu powder is applied on the surface thereof at about 0.1mm thickness with 'Teflon(R)' binder, dried and thereafter the base plate is calcined at 330°C in gaseous Ar. Further if necessary, the surface thereof may be covered with substance having H2-permeability.