To prevent inflow of liquid water into a power generating portion even if the liquid water remains in a manifold, and to enable size reduction by making constant the contact or surface pressure. According to the present invention, in a fuel cell comprising a power generating section including an electrolyte membrane joined between an anode and a cathode, and a manifold to cause inflow and outflow of an hydrogen containing gas and an oxygen containing gas separately from each other to the anode and cathode; the manifold is formed with an inflow preventing portion to prevent inflow of a liquid water remaining in the manifold, into the power generating portion.