NOVELTY - The fuel cell module comprises a fuel cell including an electrolyte membrane (30), an anode disposed on a face of the electrolyte membrane and a cathode disposed on the other face of the electrolyte member, a fuel containing unit (60) to store hydrogen storage alloy for storing hydrogen to be supplied to the fuel cell, and a latent heat storage unit (50) including flexible first heat storage materials having different melting points at or below which a dry-out begins during an operation of the fuel cell and flexible second heat storage materials having different melting points.    USE - The fuel cell module is useful in an energy supply system and power generation system, which is useful for space applications, automobiles, mobile devices and large and small scale power generation, where the fuel cell is useful as a power source for mobile devices such as cell phones, notebook-size personal computers, personal digital assistant, music players, digital cameras, electronic dictionaries or electronic books.    ADVANTAGE - The fuel cell module is easy to use, can be simply manufactured with high power generation efficiency, reduced emission of nitrogen compounds and minimal noise or vibration, reduces the occurrence of flooding and dry-out, and stably operates the fuel cell in a control manner without need of control schemes or equipment.    DETAILED DESCRIPTION - The fuel cell module comprises a fuel cell including an electrolyte membrane (30), an anode disposed on a face of the electrolyte membrane and a cathode disposed on the other face of the electrolyte member, a fuel containing unit (60) to store hydrogen storage alloy for storing hydrogen to be supplied to the fuel cell, and a latent heat storage unit (50) including flexible first heat storage materials having different melting points at or below which a dry-out begins during an operation of the fuel cell and flexible second heat storage materials having different melting points at or above which a flooding begins during an operation of the fuel cell. The latent heat storage unit is thermally connected to the fuel cell and the fuel containing unit. The latent heat storage contains the first and second heat storage materials such that the amount of the first heat storage material is greater than that of the second heat storage material in a region corresponding to a middle region of the fuel cell and such that the amount of the second heat storage material is greater than that of the first heat storage material in a region corresponding to a peripheral region of the fuel cell. The latent heat storage is demarcated into portions from those corresponding to a middle region of the fuel cell toward those corresponding to a peripheral region. The content ratio of the second heat storage material in each of the portions gradually increases starting from a portion corresponding to the middle region toward a portion corresponding to an outermost region. The melting point of the first heat storage material is less than or equal to a lower limit of a temperature at which a dry-out begins in a predetermined humidity range. The melting point of the second heat storage material is greater than or equal to an upper limit of a temperature at which a flooding begins in a predetermined humidity range. The fuel cell module further comprises a temperature sensor (28) to measure the temperature of the fuel cell, a humidity sensor to measure the humidity of the fuel cell, and a control unit (100) to lower an output of the fuel cell when the temperature measured by the temperature sensor rises to reach the melting point of the first heat storage material in a humidity range containing the humidity measured by the humidity sensor. The control unit is configured to raise the output of the fuel cell when the temperature measured by the temperature sensor drops to reach the melting point of the second heat storage material in a humidity range containing the humidity measured by the humidity sensor.    DESCRIPTION OF DRAWING(S) - The diagram shows a cross-sectional view of a fuel cell module.    Temperature sensor (28)    Electrolyte membrane (30)    Cathode catalyst layer (32)    Latent heat storage unit (50)    Fuel containing unit (60)    Control unit. (100)