A fuel cell module including: an electrode member having a membrane electrode assembly, which is formed from an electrolyte membrane and a pair of electrode catalyst layers (23a, 23b) that is disposed on both sides of the electrolyte membrane in the thickness direction, and having a pair of porous layers (21a, 21b) disposed on both sides of the membrane electrode assembly in the thickness direction; and a separator disposed layered on the electrode member so as to contact at least one of the porous layers (21a, 21b), characterized in that at least one porous layer among the pair of porous layers (21a, 21b) has a gas diffusion layer and a gas flow path layer whose porosity is larger than that of the gas diffusion layer, and the area of the membrane electrode assembly is larger than the area of at least one gas diffusion layer an adhesive rubber member is disposed on a peripheral edge portion of the electrode member so as to contact respectively the electrolyte membrane, the pair of electrode catalyst layers (23a, 23b), and the pair of porous layers (21a, 21b), a part of the adhesive rubber member impregnates the end portion of the pair of porous layers (21a, 21b), the adhesive rubber member adheres to the separator, the electrode member and the separator are integrated by the adhesive rubber member, the adhesive rubber member is formed from solid rubber including one or more rubber components selected from a group consisting of ethylene-propylene rubber, ethylene-propylene- diene rubber, acrylonitrile-butadiene rubber, hydrogenated acrylonitrile-butadiene rubber, styrene-butadiene rubber, and butadiene rubber. an electrode member having a membrane electrode assembly, which is formed from an electrolyte membrane and a pair of electrode catalyst layers (23a, 23b) that is disposed on both sides of the electrolyte membrane in the thickness direction, and having a pair of porous layers (21a, 21b) disposed on both sides of the membrane electrode assembly in the thickness direction; and a separator disposed layered on the electrode member so as to contact at least one of the porous layers (21a, 21b), characterized in that at least one porous layer among the pair of porous layers (21a, 21b) has a gas diffusion layer and a gas flow path layer whose porosity is larger than that of the gas diffusion layer, and the area of the membrane electrode assembly is larger than the area of at least one gas diffusion layer an adhesive rubber member is disposed on a peripheral edge portion of the electrode member so as to contact respectively the electrolyte membrane, the pair of electrode catalyst layers (23a, 23b), and the pair of porous layers (21a, 21b), a part of the adhesive rubber member impregnates the end portion of the pair of porous layers (21a, 21b), the adhesive rubber member adheres to the separator, the electrode member and the separator are integrated by the adhesive rubber member, the adhesive rubber member is formed from solid rubber including one or more rubber components selected from a group consisting of ethylene-propylene rubber, ethylene-propylene- diene rubber, acrylonitrile-butadiene rubber, hydrogenated acrylonitrile-butadiene rubber, styrene-butadiene rubber, and butadiene rubber.