There are disclosed a ceramic porous membrane formed with less membrane
formation times and having less defects, a small and uniform thickness
and a high resolution, and a ceramic filter. A silica membrane as a
ceramic porous membrane is formed on a titania UF membrane as an
ultrafiltration membrane (a UF membrane) formed on a porous base member
which is a microfiltration membrane (also referred to as an MF membrane)
and having an average pore diameter smaller than that of the porous base
member, the silica membrane has an average pore diameter smaller than
that of the titania UF membrane and a part of the silica membrane
permeates the titania UF membrane.