A hydrogen generation apparatus, comprising: a reformer configured to reform a raw material that contains hydrocarbon to generate a hydrogen-containing gas; a raw material supply device configured to supply the raw material to the reformer; a combustor configured to combust at least one of the raw material and the hydrogen-containing gas to heat the reformer; a combustion air supply device configured to supply combustion air to the combustor; an independent activation power supply which is a power source independent of a first power supply, the independent activation power supply configured to supply power to at least the raw material supply device and the combustion air supply device; and a controller configured to supply power to auxiliary machinery including the raw material supply device and the combustion air supply device from at least the first power supply other than the independent activation power supply to activate the auxiliary machinery during typical activation, supply power to the auxiliary machinery from only the independent activation power supply to activate the auxiliary machinery during special activation, in which power is not supplied from the first power supply, and characterized in that the controller is configured to control combustion in the combustor such that a first heating amount produced by the combustion during the special activation becomes greater than a second heating amount produced by the combustion during the typical activation, wherein the typical activation is an operation where power is being supplied from the first power supply, and the special activation is an operation where power is being supplied from only independent activation power supply, and wherein the heating amount is the amount of heat with which the hydrogen generation apparatus is heated through combustion, and wherein in a case where a temperature of the reformer becomes equal to or higher than a temperature set in advance, or predetermined time has elapsed from combustion initiation of the combustor during the special activation, the controller is configured to control combustion in the combustor so that a heating amount becomes a third heating amount that is less than the first heating amount. a reformer configured to reform a raw material that contains hydrocarbon to generate a hydrogen-containing gas; a raw material supply device configured to supply the raw material to the reformer; a combustor configured to combust at least one of the raw material and the hydrogen-containing gas to heat the reformer; a combustion air supply device configured to supply combustion air to the combustor; an independent activation power supply which is a power source independent of a first power supply, the independent activation power supply configured to supply power to at least the raw material supply device and the combustion air supply device; and a controller configured to supply power to auxiliary machinery including the raw material supply device and the combustion air supply device from at least the first power supply other than the independent activation power supply to activate the auxiliary machinery during typical activation, supply power to the auxiliary machinery from only the independent activation power supply to activate the auxiliary machinery during special activation, in which power is not supplied from the first power supply, and characterized in that the controller is configured to control combustion in the combustor such that a first heating amount produced by the combustion during the special activation becomes greater than a second heating amount produced by the combustion during the typical activation, wherein the typical activation is an operation where power is being supplied from the first power supply, and the special activation is an operation where power is being supplied from only independent activation power supply, and wherein the heating amount is the amount of heat with which the hydrogen generation apparatus is heated through combustion, and wherein in a case where a temperature of the reformer becomes equal to or higher than a temperature set in advance, or predetermined time has elapsed from combustion initiation of the combustor during the special activation, the controller is configured to control combustion in the combustor so that a heating amount becomes a third heating amount that is less than the first heating amount.