NOVELTY - Fuel cell includes fuel cell units (3), each having disposed in a stacking direction a fuel supply space disposed on one side of a polymer electrolyte layer and isolated from the atmosphere, and an oxidizer supply space disposed on another side of the polymer electrolyte layer and connecting with the atmosphere. Pair(s) of through-holes isolated from the atmosphere and connecting with the fuel supply space is disposed at planar positions having power generation region located between the through-holes.    USE - For detachably installing in portable electronic devices, e.g. digital camcorder, projector, printer, and notebook personal computer.    ADVANTAGE - The fuel cell is capable of performing an electrochemical reaction between gaseous fuel and oxygen in the atmosphere by using a polymer electrolyte layer. It increases the ratio of the area of the power generation region to the area of the fuel cell unit to increase output per unit volume and unit weight of the fuel cell. It increases output per unit production cost and can be produced with a small number of components without requiring highly precise assembly.    DETAILED DESCRIPTION - Fuel cell comprises fuel cell units, each having disposed in a stacking direction a fuel supply space disposed on one side of a polymer electrolyte layer and isolated from the atmosphere, and an oxidizer supply space disposed on another side of the polymer electrolyte layer and connecting with the atmosphere. A spacing holding member supports a thickness of the oxidizer supply space at a position outside a power generation region of the polymer electrolyte layer and has through-hole in the stacking direction. A fastening member is disposed in the through-hole, for pressing and urging the fuel supply space and the oxidizer supply space in the stacking direction. Pair(s) of through-holes isolated from the atmosphere and connecting with the fuel supply space is disposed at planar positions having the power generation region located between the through-holes.    DESCRIPTION OF DRAWING(S) - The figure is a schematic cross-sectional view illustrating the structure of the fuel cell.    Fuel cell units (3)    Separator (6)    Polymer electrolyte membrane (8)    Fuel electrode chamber (32)    Fuel supply flow hole (83)