Polymer electrolyte type fuel cell

A polymer electrolyte fuel cell comprising:

• a hydrogen ion conductive polymer electrolyte membrane;
• a pair of electrodes sandwiching said hydrogen ion conductive polymer electrolyte membrane therebetween;
• and
• a pair of conductive separator plates including means for supplying and discharging a fuel gas to and from one of said electrodes and supplying and discharging an oxidant gas to and from the other electrode,
• wherein said conductive separator plates comprise molded plates of a composition comprising a binder, conductive carbon particles whose average particle diameter is not less than 50 μm and not more than ⅓ of a thickness of a thinnest portion of said conductive separator plate, and carbon nanotubes;
• wherein said carbon nanotubes have a diameter of 10 to 30 nm and a length of 1 to 10 μm;
• and
• wherein said binder is an acid-resisting resin.