NOVELTY - A powder of a compound containing alkaline-earth metal carbonate which decomposes by heating at temperature lower than the specified sintering temperature, and discharges carbon dioxide, and powder of titania are mixed in specified ratio to obtain a mixed powder. The obtained mixed powder is slurried, and coated on an airtight film (27). The resultant material is heat-processed at specified sintering temperature to obtain seal structural component (28) containing perovskite-type oxide and titania.    USE - Manufacture of seal structural component used for manufacturing solid oxide fuel cell module (claimed) e.g. cylindrical horizontal-stripes-type solid oxide fuel cell or cylindrical horizontal-stripes-type high-temperature-steam electrolysis cell.    ADVANTAGE - The method efficiently provides seal structural component having excellent adhesiveness between structure particles, and does not peel easily. The solid oxide fuel cell module formed using the seal structural component has reduced fuel leak.    DETAILED DESCRIPTION - A powder of a compound containing alkaline-earth metal carbonate which decomposes by heating at temperature lower than the specified sintering temperature, and discharges carbon dioxide, and powder of titania are mixed in specified ratio to obtain a mixed powder. The obtained mixed powder is slurried, and coated on an airtight film. The resultant material is heat-processed at specified sintering temperature to obtain seal structural component containing perovskite-type oxide (ATiO3, where A is not defined) and titania. The seal structural component is provided on the airtight film of cell tubes provided with an electroconductive lead film (26) electrically connected to the endmost portion of cell films. Cell films having sequential lamination of a fuel electrode, solid electrolyte and air electrode, are formed on the outer peripheral surface of a substrate pipe (21) containing porous material. An INDEPENDENT CLAIM is included for manufacture of solid oxide fuel cell module.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of film structure of seal portion.    Substrate pipe (21)    Lead film (26)    Airtight film (27)    Seal structural component (28)    Inorganic-type adhesive agent (29)    Sealing component (30)