To provide a fuel cell device capable of easily controlling an igniting heater, and high in ignition reliability.

This fuel cell device is provided with: a storage vessel 1; solid oxide fuel cells 4a stored in the storage vessel 1; a reformer 3 reforming raw fuel to supply fuel gases to the solid oxide fuel cells 4a; an igniting heater 15 stored in the storage vessel 1; and a control part 11 controlling electricity application to the igniting heater 15 wherein the control part 10 applies electricity to the igniting heater 15 during a starting process to ignite and burn a mixture gas comprising surplus fuel gases supplied to fuel electrodes of the fuel cells 4a without having been used for a power generation reaction, and surplus oxygen-containing gases supplied to oxygen electrodes of the fuel cells 4a without having been used for the power generation reaction. The control part 10 continuously applies electricity to the igniting heater 15 during the starting process.

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