Process for procucing porous laminate and porous laminate

A porous laminate comprising at least three layers including: a pair of both outer layers, made of a resin composition containing a filler and a thermoplastic resin, which is disposed on outermost surfaces of said porous laminate; and an interlayer, made of a polypropylene resin composition not containing a filler, which is disposed between said both outer layers, wherein a large number of micro-pores interconnectable in a thickness direction thereof is present through said both outer layers and said interlayer; and a gas permeability of said porous laminate is set to 1 to 10,000 seconds/100ml.