Abstract: A fuel cell having a membrane electrode assembly to cause an electrochemical reaction in a fuel so as to generate electric power, a fuel holding body for holding the fuel to supply the fuel to the membrane electrode assembly, a fuel supply path to supply the fuel being pressurized to the fuel holding body and a fuel exhausting path to exhaust the fuel from the fuel holding body by using an internal pressure of the fuel.

Abstract: A fuel cell unit comprises a fuel cell body, a case and a seal member. The fuel cell body has a membrane electrode assembly for generating power, which comprises an anode being supplied with fluid fuel, a cathode being exposed to atmosphere to be supplied with an oxydant, a membrane sandwiched between the anode and cathode, and a fuel tank connected to a fuel cartridge, from which the liquid fuel is supplied to the anode. The case has an internal space for accommodating an electronic part, the case enclosing and holding the fuel cell body and having an opening in the area of the cathode of the membrane electrode assembly and opened to the outside. The seal member for providing a seal is disposed between the edges surrounding the opening in the case and the fuel cell body to shield the internal space from the opening.

Abstract: For providing a fuel cell unit and a fuel cell unit assembly, wherein membrane electrode assembly and current collector plates are closely contact with each other, so that a liquid fuel hardly leaks out therefom, and further an electronic apparatus equipped with those therein, a DMFC unit U1 for generating electricity through supply of methanol solution therein comprises a MEA 11, a pair of current collector plates 12 and 13 for the MEA, a fuel tank 20 having a fuel chamber 20a where the methanol solution is stored therein, and a holding means 40 for holding the current collector plates 12 and 13 within an area where the MEA 11 is disposed.