An object of the present invention is to provide a material containing a saponin wherein the bitterness peculiar to saponin is effectively suppressed. According to the present invention, a saponin, a phytosterol and/or a phytosterol ester, and a cyclodextrin are mixed to form a complex, so as to suppress bitterness. The complex of the present invention can be formed in the presence of water by mixing a saponin, a phytosterol and/or a phytosterol ester, and a cyclodextrin. The complex of the present invention can be contained in a composition such as a food or beverage.
