NOVELTY - Manufacturing support, comprises e.g. mixing magnesium source raw materials and aluminum source raw materials, calcining the obtained raw materials mixture, pulverizing the obtained calcined raw materials, mixing 20-100 pts. wt. materials including aluminum oxide and magnesium aluminate spinel based on 100 pts. wt. magnesia and/or magnesia having low Brunauer-Emmett-Teller (BET) of 0.1-40 m2/g to obtain starting material, molding and drying the obtained mixture in fuel supply passage to obtain flat pipe shape, and plasticizing the molded product at 1400-1800 degrees C.    USE - The support is useful for solid oxide fuel cell (claimed).    ADVANTAGE - The support is economical, exhibits excellent mechanical strength and heat resistance, suppresses crack and other defects and ensures insulation between the cells of the solid oxide fuel cell.    DETAILED DESCRIPTION - Manufacturing support, comprises either: (ai) mixing magnesium source raw materials and aluminum source raw materials, (aii) calcining the obtained raw materials mixture to obtain calcined raw materials, (aiii) pulverizing the obtained calcined raw materials, (aiv) mixing 20-100 pts. wt. materials including aluminum oxide and magnesium aluminate spinel based on 100 pts. wt. magnesia and/or magnesia having low Brunauer-Emmett-Teller (BET) of 0.1-40 m2/g to obtain starting material, (av) molding and drying the obtained mixture in fuel supply passage to obtain flat pipe shape, and (avi) plasticizing the molded product at 1400-1800 degrees C, where the starting material further comprises 1-50 pts. wt. pulverized calcined raw materials based on 100 pts. wt. magnesia; (bi) mixing 20-100 pts. wt. materials including aluminum oxide, 0.01-5 pts. wt. magnesium nitrate sol, 0.01-5 pts. wt. magnesium acetate and magnesium aluminate spinel based on 100 pts. wt. magnesia and/or magnesia having low BET of 0.1-40 m2/g to obtain starting material, (bii) molding and drying the obtained mixture in fuel supply passage to obtain flat pipe shape, and (biii) plasticizing the molded product at 1400-1800 degrees C; or (ci) mixing 20-100 pts. wt. materials including aluminum oxide, aluminum isopropoxide sol, alumina sol and magnesium aluminate spinel based on 100 pts. wt. magnesia and/or magnesia having low BET of 0.1-40 m2/g to obtain starting material, (cii) molding and drying the obtained mixture in fuel supply passage to obtain flat pipe shape, and (ciii) plasticizing the molded product at 1400-1800 degrees C.