A fuel cell module which is capable of easily securing an adequate sealing function even when the unit cell is made thinner. The fuel cell module includes a stacked body which includes: a stacked structure including: an electrolyte layer, and a pair of electrodes provided to sandwich the electrolyte layer; and a pair of separators disposed to sandwich the stacked structure, the separators being arranged at least one end of the stacked body in the stacking direction, the separators which are arranged at the end of the stacked body having a groove which is capable of receiving a sealing member in a face which does not oppose to the stacked structure, and the at least one groove being a deep groove of which depth is larger than the thickness of the separator having the groove.