Fuente: WIPO "milk" According to the invention, a composition which can promote the growth of a Bifidobacterial strain which can be a good bacterium is provided. The composition contains a human milk oligosaccharide mixture containing lacto-N-neotetraose, lacto-N-tetraose, 2'-fucosyllactose, 3'-sialyllactose, 6'-sialyllactose and Bifidobacterium longum subspecies infantis.