Ceramic filter

A ceramic filter having:

• (A) a base body having partition walls made of a ceramic porous body having a large number of pores, wherein cells each functioning as a passage of a fluid are defined by the partition walls,
• (B) filter membranes provided on the partition walls, made of a ceramic porous body having a large number of pores whose average pore diameter is 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 (CaO), baria (BaO) and strontia (SrO) but substantially not containing zinc oxide (ZnO).