Architectonics of the paper-structured catalyst for the application to the biofuel reformer or direct internal reforming SOFC (DIRSOFC) was studied. Inorganic fiber network, "paper", composed of yttria-stabilized zirconia (YSZ) fiber (Zf), alumina fiber (Af) and inorganic binder (Al2O3 sol (As) or ZrO2 sol (Zs) or CeO2 sol (Cs)) was prepared by a simple paper-making process. Then, the catalytic activities of the Ni and Ni-MgO loaded papers called "paper-structured catalysts (PSCs)" for the steam reforming of biodiesel fuels (BDFs) were evaluated. Ni-MgO loaded PSC using Cs as an inorganic binder, Ni-MgO/ZfAfCs, exhibited excellent performance over Ru/gamma Al2O3 catalyst beads. Formation of light hydrocarbons, especially C2H4, was eliminated and water gas shift reaction was more promoted compared to the catalyst beads. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.