NOVELTY - The hydrogen generation device (100) comprises a first groove for containing a liquid water (50), a cover fixed on the first containing groove and covering the liquid water, where the cover has an opening for exposing the liquid water, a second containing groove stacked on the cover, where the second containing groove is divided into compartments, a rotating device such as a stepper motor connected to the first containing groove and the second containing groove, and a water absorbing structure. Each of the containing compartments contains a solid fuel (60).    USE - The hydrogen generation device is useful for a fuel cell, which is useful in portable electronic products such as a notebook computer and a cell phone, home electricity generation systems, transportation vehicles such as car and boat, military equipments, space industry, and small-scale electricity generation systems.    ADVANTAGE - The hydrogen generation device improves the energy density and energy conversion efficiency of the fuel cell thus capable of efficiently generating electricity without pollution and noise.    DETAILED DESCRIPTION - The hydrogen generation device (100) comprises a first groove for containing a liquid water (50), a cover fixed on the first containing groove and covering the liquid water, where the cover has an opening for exposing the liquid water, a second containing groove stacked on the cover, where the second containing groove is divided into compartments, a rotating device such as a stepper motor connected to the first containing groove and the second containing groove, and a water absorbing structure. Each of the containing compartments contains a solid fuel (60). The opening is aligned with the containing compartments so that the corresponding solid fuel reacts with the liquid water to form hydrogen. The opening is moved and aligned with another one of the containing compartments, when the rotating device drives the first containing groove and the second containing groove to rotate relatively around an axis. The water absorbing structure is disposed in the first containing compartment for absorbing the liquid water. The second containing groove is pivoted to the cover along the axis. An INDEPENDENT CLAIM is included for a fuel cell.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a hydrogen generation device.    Liquid water (50)    Solid fuel (60)    Hydrogen generation device (100)    Fuel cell stack (200)    Guiding structure. (300)