To synthesize perovskite-type (La1-xCax )CoO3 with good crystallinity (regularity of ions), a gel was prepared by adding ethylene glycol and citric acid to an aqueous solution of La(NO3)(3) center dot 6H(2)O, CaCO3, and Co(CH3COO)(2) center dot 4H(2)O. Perovskite-type (La1-xCax )CoO3 (0.0 <= x <= 0.3) was obtained by firing the gel above 600 degrees C in air for 3 h. Samples were examined for oxygen content, crystallite size, specific surface area, and the catalytic activity of CH4 oxidation. The samples were also investigated by transmission electron microscopy (TEM). Based on the variation in crystallite size and in the average particle size, the (La1-xCax )CoO3 particle became finer as x increased. In all samples, CH4 oxidation occurred above 300 degrees C. The catalytic activity of (La1-xCax )CoO3 fired at 700 degrees C monotonously increased as x increased.