Patent claim: A fuel cell module 11 comprising a power generation portion 40 including a fuel cell 43a generating electric power from an anode gas and a cathode gas and a combusting portion 44 combusting an anode offgas and generating an exhaust combustion gas a first cylindrical member 51 151 formed in a cylindrical shape and arranged to surround the power generation portion 40 the first cylindrical member 51 151 including a first peripheral side wall 51 a including an inner surface facing an outer wall surface of the power generation portion 40 while a first space portion S1 is provided between the inner surface of the first peripheral side wall 51 a and the outer wall surface of the power generation portion 40 the first cylindrical member 51 151 including first and second opening portions 51 b provided at respective ends of the first cylindrical member 51 151 a second cylindrical member 52 formed in a cylindrical shape and arranged to surround the first cylindrical member 51 151 the second cylindrical member 52 including a second peripheral side wall 52a including an inner surface facing an outer surface of the first peripheral side wall 51a of the first cylindrical member 51 151 while a second space portion S2 is provided between the inner surface of the second peripheral side wall 52a and the outer surface of the first peripheral side wall 51a the second cylindrical member 52 including first and second opening portions 52b provided at respective ends of the second cylindrical member 52 a first cover member 53 formed to cover at least one of the first opening portion 51 b of the first cylindrical member 51 151 and the first opening portion 52b of the second cylindrical member 52 the first cover member 53 being joined to the at least one of the first opening portion 51b of the first cylindrical member 51 151 and the first opening portion 52b of the second cylindrical member 52 throughout an entire circumference of the at least one of the first opening portion 51b of the first cylindrical member 51 151 and the first opening portion 52b of the second cylindrical member 52 a second cover member 54 formed to cover at least one of the second opening portion 51 b of the first cylindrical member 51.151 and the second opening portion 52b of the second cylindrical member 52 the second cover member 54 being joined to the at least one of the second opening portion 51b of the first cylindrical member 51 151 and the second opening portion 52b of the second cylindrical member 52 throughout an entire circumference of the at least one of the second opening portion 51 b of the first cylindrical member 51 151 and thesecond opening portion 52b of the second cylindrical member 52 a first flow passage 60 provided between the outer wall surface of the power generation portion 40 and the inner surface of the first peripheral side wall 51 a of the first cylindrical member 51 151 the first flow passage 60 allowing one of the anode gas the cathode gas and the exhaust combustion gas to flow through the first flow passage 60 and a second flow passage 70 provided between the outer surface of the first peripheral side wall 51a of the first cylindrical member 51 151 and the inner surface of the second peripheral side wall 52a of the second cylinder member 52 the second flow passage 70 allowing another of the anode gas the cathode gas and the exhaust combustion gas to flow through the second flow passage 70.

Related passage: Thus when viewed in the crosssectional view Fig.1 in the height direction of the fuel cell apparatus the direction of the arrow H in a case where the first closing member 201 and the second closing member 202 thermally expand and undergo extensional deformation or elongation deformation in a width direction a transverse direction the direction of the arrow X1 of the housing 200 the deformation volume of the first closing member 201 is transmitted to the first intersection portions 214 via the respective first side walls 212 and the deformation volume of the second closing member 202 is transmitted to the second intersection portions 224 via the respective second side walls 222.Even in such a case the first intersection portions 214 are flexible and therefore are likely to allow the first side walls 212 to be deformed relative to the first bottom wall 213 in the direction of the arrow K1 so as to follow the deformation of the first closing member 201.The second intersection portions 224 are flexible and therefore are likely to allow the second side walls 222 to be deformed relative to the second bottom wall 223 in the direction of the arrow K2 so as to follow the deformation of the second closing member 202.The same applies to the third intersection portions 234 of the third Ushaped plate member 230.