To provide a filter cartridge which has resistance to chemical liquids frequently used in a semiconductor manufacturing process and has a function for decreasing metal ions in the chemical liquids.

A precision filtration filter cartridge characterized by a constitution wherein, in the precision filtration filter cartridge prepared from a constitution wherein the whole of microporous filter membranes, membrane supports, a core, an outer peripheral cover and end plates constituting the filter cartridge is made of a polysulfone based polymer, the supports have a metal ion catching function, is provided. The precision filtration filter cartridge (1) characterized by the membrane supports being microporous membranes in which a number of fine channels and/or projected parts are formed is provided. The precision filtration filter cartridge (1) or (2) characterized by the microporous filtration membranes comprising a sulfonated polysulfone based polymer is provided.