NOVELTY - Fuel cell stack (1) comprises: a proton exchange membrane (113); first and second reinforcements (131, 132) each of which includes a cover portion covering a periphery of the exchange membrane and an extending portion extending laterally beyond the proton exchange membrane; a flow conduit (124) arranged between the extending portions of the reinforcements; and an adhesive member (140) attaching the covering portion of each of the reinforcements to the exchange membrane and attaching the extending portion of the first reinforcement to the extending portion of the second reinforcement.    USE - Fuel cell stack.    ADVANTAGE - The fuel cell stack economically prevents the gas leaks towards the outside and the permeation of cooling liquid towards the membrane using the adhesive member.    DETAILED DESCRIPTION - Fuel cell stack (1) comprises: a proton exchange membrane (113); first and second reinforcements (131, 132) each of which includes a cover portion covering a periphery of the proton exchange membrane and having a central opening and an extending portion extending laterally beyond the proton exchange membrane, where the periphery of the proton exchange membrane is disposed between the covering portions of the first and second reinforcements; a flow conduit (124) arranged between the extending portions of the first and second reinforcements; and an adhesive member (140) attaching the covering portion of each of the reinforcements to the proton exchange membrane and attaching the extending portion of the first reinforcement to the extending portion of the second reinforcement. The adhesive member includes 1-4.9 wt.% of methyl cellulose of a solid content of the adhesive member, and 16-98.99 wt.% latex of acrylic type, styrene butadiene type or acrylonitrile-butadiene rubber type of the solids content of the adhesive member. An INDEPENDENT CLAIM is included for manufacturing the fuel cell stack, comprising providing the first and second reinforcements on the periphery of which the adhesive member is fixed, contacting the periphery of the proton exchange membrane with the adhesive member of the first and second reinforcements, so that the first and second reinforcements extend laterally beyond the proton exchange membrane, attaching the adhesive members with the proton exchange membrane by a method of hot pressing, and forming an opening passing through the first and second reinforcements in portions extending laterally beyond the proton exchange membrane.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross sectional view of a fuel cell stack.    Fuel cell stack (1)    Proton exchange membrane (113)    Flow conduit (124)    Reinforcements (131, 132)    Adhesive member. (140)