A fuel cell stack at least includes a first dummy cell provided at one end of a stack body formed by stacking a plurality of power generation cells in a stacking direction. A dummy assembly of the first dummy cell includes a first electrically conductive porous body, a second electrically conductive porous body, and a third electrically conductive porous body, which are stacked in this order. A first joint layer is interposed between the first electrically conductive porous body and the second electrically conductive porous body to join the first and second electrically conductive porous bodies together, and a second joint layer is interposed between the second electrically conductive porous body and the third electrically conductive porous body to join the second and third electrically conductive porous bodies together. The first joint layer and the second joint layer are provided at different positions in the stacking direction.