PURPOSE: To enable cell reaction to be kept up stably by facilitating gas discharge while gas is being dispersed by means of steam of generated water and moving water even in the downstream of each oxidant flow path, and also facilitating discharge of generated water and moving water which are liquefied and/or formed into a state of droplets.

CONSTITUTION: The fuel cell is equipped with a laminated body 31 where an anode and a cathode are disposed on both the surfaces of an electrolyte layer 32 respectively, a fuel distributing plate 37 which is provided for the anode side of the aforesaid layer 31 while being furnished with each fuel flow path 36 feeding fuel to the aforesaid anode, and with oxidant distributing plate 40 which is provided for the cathode side of the aforesaid laminated body 31 while being furnished with each oxidant flow path 39 feeding oxidant to the aforesaid cathode. And the percentage of voids of the cathode to which oxidant is fed is made gradually large along the flow path of oxidant from the upstream side to the downstream side, so that the percentage of voids is thereby changed along an oxidant flow path 39.