NOVELTY - The methanol reformer (10) has a catalyzed-combustion portion (6), a raw-material heating portion (1), a raw-material modification portion (3), and an air-preheat portion (8) arranged at the outer periphery of the catalyzed-combustion portion. The catalyzed-combustion portion has a combustion catalyst layer filled with a catalyst which burns air and mixed fuel gas. The modification portion has modification-catalyst layer.    USE - For electric generators used in stores and restaurants.    ADVANTAGE - The methanol reformer is simple, compact and economical, decreases the heat loss, and increases the thermal efficiency and combustion efficiency of fuel gas. Air preheat is carried out easily, and the installation is started rapidly. The methanol reformer provides reformed gas with low byproduct rate with respect to carbon monoxide, with high modification efficiency.    DETAILED DESCRIPTION - The methanol reformer (10) has a catalyzed-combustion portion (6), a raw-material heating portion (1), a raw-material modification portion (3), and an air-preheat portion (8) arranged at the outer periphery of the catalyzed-combustion portion. The catalyzed-combustion portion centers on the axis line of a cylindrical casing (11), and is arranged concentric-circularly in the upright cylindrical casing. The catalyzed-combustion portion has a combustion catalyst layer filled with a catalyst which burns air and a mixed fuel gas, and is penetrated up and down on the central side of the casing. The heating portion centers on the axis line of the casing, is arranged concentric-circularly, and heats methanol and water to preset temperature. The modification portion centers on the axis line of the casing, and is arranged concentric-circularly at the outer side from the heating portion. The modification portion has a modification-catalyst layer filled with a catalyst which modifies the source gas heated by the heating portion. The preheat portion heats the catalyzed-combustion portion while preheating the air for catalyzed combustion.    DESCRIPTION OF DRAWING(S) - The figure shows the longitudinal cross-sectional view of the methanol reformer.    raw-material heating portion (1)    raw-material modification portion (3)    catalyzed-combustion portion (6)    air preheat portion (8)    methanol reformer (10)    cylindrical casing (11)