An object of the utility model is to provide a compact water purifying filter cartridge that loss of pressure is lower and the filter capacity is higher who just filters piece portion. Water purifying filter cartridge restraints and filters with the powder at the inside cavity cortina of taking in in the space that is become by shell and tectiform, aforementioned shell is distolateral under to have the raw water entry and exports with the water purification, aforementioned lid seals the upper end of aforementioned shell, a serial communication port, aforementioned cavity cortina is restrainted by the sealed lower extreme that is fixed in aforementioned inner tube, and held in aforementioned inner tube, aforementioned powder filters the piece to be held in by aforementioned inner tube, the urceolus, the accommodation space of the roughly tube -shape that upper wall and lower wall formed, the upper end of aforementioned inner tube is located the position of aforementioned inner?surface?of the?cover's tight below, can restraint the surface of side from the surface of the aforementioned shell -side of aforementioned urceolus to the aforementioned cavity cortina of aforementioned inner tube, footpath at water purifying filter cartridge upwards leads to water.