Solid oxide fuel cell system

A solid oxide fuel cell system in which fuel cells within a fuel cell module are connected in an airtight manner using ceramic adhesive. Asolid oxide fuel cell system (1) for generating electricity by reacting fuel and oxidant gas, including: a fuel cell module (2) containing multiple fuel cells (16), and a fuel gas dispersion chamber (76) for distributing and supplying fuel to each of the fuel cells (16), whereby each of the fuel cells is affixed in an airtight manner using ceramic adhesive to an affixing member (63) forming the fuel gas dispersion chamber, and a gas leak suppression portion for suppressing the occurrence of cracks caused by shrinkage when a ceramic adhesive hardens is formed by the ceramic adhesive layer around the fuel cells.