A method for manufacturing a solid oxide fuel cell apparatus in which fuel and oxidant gas are supplied to multiple fuel cells housed within a fuel cell module to generate electricity, comprising steps of: an adhesive application step for applying ceramic adhesive between different parts of the solid oxide fuel cell apparatus so that an airtight flow path for guiding fuel or oxidant gas within the fuel cell module is fabricated; and a drying and hardening step for drying and hardening the applied ceramic adhesive; wherein the drying and hardening step includes steps of: a workable hardening step for hardening the applied ceramic adhesive at a predetermined first temperature; and a solvent elimination and hardening step carried out after multiple repetitions of the adhesive application step and the workable hardening step; wherein the solvent elimination and hardening step further removes solvent remaining within the ceramic adhesive hardened in each of the workable hardening steps to further harden the ceramic adhesive by raising to a second temperature, higher than the first temperature and approximately equal to the temperature of the fuel cells during electrical generation by the completed solid oxide fuel cell apparatus, and the method further comprising steps of: a second fitting step for assembling additional parts of the solid oxide fuel cell apparatus to a fuel cell module assembly on which the solvent elimination and hardening step has been completed; a second adhesive application step for applying ceramic adhesive between different parts assembled in the second fitting step; and a second drying and hardening step for drying and hardening ceramic adhesive applied in the second adhesive application step; wherein the parts assembled in the second fitting step include at least one part unable to withstand the second temperature, and the second drying and hardening step is executed by raising the temperature to a predetermined third temperature lower than the second temperature. an adhesive application step for applying ceramic adhesive between different parts of the solid oxide fuel cell apparatus so that an airtight flow path for guiding fuel or oxidant gas within the fuel cell module is fabricated; and a drying and hardening step for drying and hardening the applied ceramic adhesive; wherein the drying and hardening step includes steps of: a workable hardening step for hardening the applied ceramic adhesive at a predetermined first temperature; and a solvent elimination and hardening step carried out after multiple repetitions of the adhesive application step and the workable hardening step; a workable hardening step for hardening the applied ceramic adhesive at a predetermined first temperature; and a solvent elimination and hardening step carried out after multiple repetitions of the adhesive application step and the workable hardening step; wherein the solvent elimination and hardening step further removes solvent remaining within the ceramic adhesive hardened in each of the workable hardening steps to further harden the ceramic adhesive by raising to a second temperature, higher than the first temperature and approximately equal to the temperature of the fuel cells during electrical generation by the completed solid oxide fuel cell apparatus, and the method further comprising steps of: a second fitting step for assembling additional parts of the solid oxide fuel cell apparatus to a fuel cell module assembly on which the solvent elimination and hardening step has been completed; a second adhesive application step for applying ceramic adhesive between different parts assembled in the second fitting step; and a second drying and hardening step for drying and hardening ceramic adhesive applied in the second adhesive application step; wherein the parts assembled in the second fitting step include at least one part unable to withstand the second temperature, and the second drying and hardening step is executed by raising the temperature to a predetermined third temperature lower than the second temperature.