NOVELTY - Hydrogen gas generation apparatus (100) comprises: a main body (110); a bimetallic switch (120) having one end connected to the main body; a reserve tank (130) fixed to the main body and capable of reserving liquid water; and a sliding member (140) slidably disposed on the main body, where a solid fuel is fixed to the sliding member, so that, another end of the bimetallic switch pushes the sliding member toward the reserve tank and the solid fuel reacts with the liquid water in the reserve tank to form hydrogen gas when the bimetallic switch is heated to bend.    USE - The hydrogen gas generation apparatus is useful for a fuel cell (claimed) in electronic devices (including notebook computers or mobile phones) and transportation (including vehicles or ships).    ADVANTAGE - The hydrogen gas generation apparatus provides a multi-stage reaction, since: the sliding member can be moved toward or away from the reserve tank reserving the liquid water under the driving of the bimetallic switch, so that the reaction between the solid fuel fixed to the sliding member and the liquid water take place to form the hydrogen gas or be halted; and the reserve tank can be partitioned into many reserve spaces for reserving the liquid water, and the solid fuel is separated into many fuel bricks to react with the liquid water in the reserve spaces, respectively, so that the reaction area can be increased to enhance the reaction efficiency.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a fuel cell comprising: the hydrogen gas generation apparatus; a cell stack; and a guide structure connected between the hydrogen gas generation apparatus and the cell stack and capable of guiding the hydrogen gas formed by the reaction between the solid fuel and the liquid water to the cell stack.    DESCRIPTION OF DRAWING(S) - The figure illustrates the hydrogen gas generation apparatus.    Hydrogen gas generation apparatus (100)    Main body (110)    Bimetallic switch (120)    Reserve tank (130)    Sliding member (140)