Heat and hydrogen generation device

A heat and hydrogen generation device comprising a housing, a burner combustion chamber formed in the housing, a burner having a fuel injection port and an air feed port for performing a burner combustion in the burner combustion chamber, a fuel feed device for feeding fuel to the fuel injection port, an air feed device for feeding air to the air feed port, and a reformer catalyst arranged in the housing and to which a burner combustion gas generated in the burner combustion chamber is fed, the air feed device being provided with a heat exchange part for heating air fed to the air feed port by the burner combustion gas, heat and hydrogen being generated by performing the burner combustion, wherein said air feed device is provided with a switching device able to switch an air flow route for introducing an outside air to said air feed port between a high temperature air flow route for introducing the outside air flowing within said heat exchange part and heated at said heat exchange part to said air feed port and a low temperature air flow route for feeding the outside air, which does not flow within said heat exchange part, and thereby is lower in temperature than the outside air heated at said, heat exchange part, to said air feed port.