NOVELTY - Layer of hydride (7) and water absorption material (8) is separated by water permeable material (6). Water molecules from component (8) passed through component (6), and hydride are reacted in sealable container (1), to obtain hydrogen. Components (6, 8) are separated by internal pressure change in container (1). Amount of water permeate through component (6) is controlled, to control reaction of hydride and water.    USE - For generating hydrogen used for fuel cells used for portable and medium-sized apparatuses such as cartridge-type mobile devices e.g. personal digital assistance (PDA), and notebook personal computers, and as energy source for chemical industries and petroleum refining.    ADVANTAGE - The method efficiently, stably and easily generates hydrogen having excellent utility as energy source, and regeneration property. The fuel cell using the hydrogen, is lightweight and inexpensive. Swelling and movement of hydride during the reaction are prevented.    DETAILED DESCRIPTION - The layer of hydride (7) and water absorption material (8) which impregnated water, is separated by water permeable material (6) formed with a water permeable film having several micropores. The micropores permeate trace amount of water and water vapor. Water molecules from component (8) passed through component (6), and hydride are reacted in a sealable container (1), to hydrolyze hydride and to obtain hydrogen. Components (6, 8) are separated by internal pressure change in container (1) during reaction at the time of inner-pressure rise. Amount of water molecules permeate through the component (6) is controlled, by contacting hydride and water molecules to control reaction of hydride and water molecule.    An INDEPENDENT CLAIM is included for hydrogen generator.    DESCRIPTION OF DRAWING(S) - The figure shows the front view of the hydrogen generator used in the hydrogen generation method. (Drawing includes non-English language text).    sealable container (1)    diaphragm (5)    water permeable material (6)    hydride (7)    water absorption material (8)