A porous filter comprising a porous laminate having a plurality of PTFE biaxially stretched porous sheets laminated therein. The Gurley number (G) and the bubble point (B) of the porous laminate fulfil formulas (1) and (2). log G > 3.7 × 10-3 × B - 0.8 … (1) log G < 4.9 × 10-3 × B + 0.45 … (2)
