NOVELTY - A small particle size aluminum powder and large particle size aluminum powder are mixed, and organic vehicle is dispersed to the mixed aluminum powder, to obtain a paste-form composition. The center grain diameter (D50) of particle size distribution of small particle size aluminum powder based on laser diffractometry is 3 mu m or less. The center grain diameter (D50) of particle size distribution of large particle size aluminum powder based on laser diffractometry is 2-6 times the center grain diameter (D50) of the small particle size aluminum powder.    USE - Manufacture of paste-form composition used for solar cell (claimed).    ADVANTAGE - The paste-form composition is efficiently manufactured, and provides solar cell having excellent reliability.    DETAILED DESCRIPTION - A small particle size aluminum powder and large particle size aluminum powder are mixed, and organic vehicle is dispersed to the mixed aluminum powder, to obtain a paste-form composition. The density of dry aluminum film formed using the prepared paste-form composition is higher than the density of dry aluminum film formed using the paste-form composition prepared using the small particle size aluminum powder as an aluminum component. The center grain diameter (D50) of particle size distribution of small particle size aluminum powder based on laser diffractometry is 3 mu m or less. The ratio of particle size (D10) of small particle size aluminum powder when accumulation volume is 10% and particle size (D90) of small particle size aluminum powder when accumulation volume is 90%, is 0.2 or more. The center grain diameter (D50) of particle size distribution of large particle size aluminum powder based on laser diffractometry is 2-6 times the center grain diameter (D50) of the small particle size aluminum powder. The ratio of particle size (D10) of large particle size aluminum powder when accumulation volume is 10% and particle size (D90) of large particle size aluminum powder when accumulation volume is 90%, is 0.2 or more.