NOVELTY - Gas heating device comprises a heating mechanism in a container with gas inlet(s) and gas outlet(s), an induction coil for electromagnetic induction heating provided on the periphery of the container, and a columnar heating mechanism. Each columnar heating mechanism is provided so that the longitudinal direction of the columnar heating mechanism is parallel to the longitudinal direction of the container.    USE - Used for heating gas to produce hydrogen-containing gas or high temperature superheated steam.    ADVANTAGE - The device achieves good heating efficiency, thus heating efficiency is enhanced. It provides outstanding durability based on its good properties in terms of corrosion resistance, chemical resistance, heat resistance, abrasion resistance, and provides economic efficiency.    DETAILED DESCRIPTION - A gas heating device comprises a heating mechanism in a container (1) with gas inlet(s) and gas outlet(s) (4a), an induction coil for electromagnetic induction heating provided on the periphery of the container, and columnar heating mechanisms (7). Each columnar heating mechanism is provided so that the longitudinal direction of the columnar heating mechanism is parallel to the longitudinal direction of the container. The device is used for heating gas by bringing gas into contact with the heater.    INDEPENDENT CLAIMS are included for the following:    (1) producing a hydrogen-containing gas comprising supplying steam into the gas heating device through a gas inlet and bringing the steam into contact with a hot heating mechanism in it; and    (2) producing high-temperature superheated steam of at least 600 degrees C comprising supplying steam into a gas heating device through a gas inlet and bringing the steam into contact with a hot heating mechanism in it.    DESCRIPTION OF DRAWING(S) - The figure shows a heating device.    Container (1)    Cylindrical (2)    Bottom cover (3)    Top cover (4)    Gas outlet (4a)    Insulator (5)    Columnar heating mechanisms (7)    Gaps (8)