Abstract: A ceramic filter has (A) a base body having partition walls made of a ceramic porous body, wherein cells 18 are defined by the partition walls, (B) filer membranes provided on the partition walls, made of a ceramic porous body having an average pore diameter smaller than that of the surface of each partition wall, and (C) a glass seal provided so as to cover at least the end face of the base body, wherein the glass seal is constituted by an alkali-free glass containing silica (SiO2) in an amount of 55 to 65 mol %, zirconia (ZrO2) in an amount of 1 to 10 mol % and at least one kind of alkaline earth metal oxide selected from calcia, baria and strontia but substantially not containing zinc oxide.