<p>Disclosed is a multilayer porous film which comprises a porous film made of a resin composition containing a polypropylene and a polyolefin other than polypropylenes, and a porous layer arranged on at least one side of the porous film and containing an inorganic filler. This multilayer porous film has both excellent heat resistance and good shut down property which enable to prevent short-circuit between electrodes even when a large amount of heat is generated due to abnormal heat generation.</p>
