Disclosed is a hollow fiber that includes a hollow positioned at the
center of the hollow fiber, macropores positioned at adjacent to the
hollow, and mesopores and picopores positioned at adjacent to macropores,
and the picopores are three dimensionally connected to each other to form
a three dimensional network structure. The hollow fiber includes a
polymer derived from polyimide, and the polyimide includes a repeating
unit obtained from aromatic diamine including at least one
ortho-positioned functional group with respect to an amine group and
dianhydride.