A process for manufacturing a separation membrane with excellent
productivity, which can uniformly dry and imidize a separation membrane
precursor solution formed on an inner surface of through-holes of a
monolith substrate and which does not require complicated operations such
as placement of a monolith substrate in a dryer, and the separation
membrane manufactured by the process are provided. The separation
membrane is manufactured comprising: causing a separation membrane
precursor solution to pass through through-holes in a porous monolith
substrate, to form a membrane of the precursor solution on the surface of
the through-holes, and drying the membrane by causing hot wind to pass
through the through-holes.