WATER PURIFIER-USE CARTRIDGE

Provided is a water purifier-use cartridge having a slim structure having a small outer diameter and also a favorable water purifying function. The water purifier-use cartridge includes a container main body (2) having a filtering medium container (4) and a lid portion (5) bonded to the opening end side of the filtering medium container and a filtering medium (3) accommodated in the filtering medium container. The lid portion (5) is provided with a water intake port and a water discharge port, a first water passage (8) communicating with the water intake port is formed on an outer side of the filtering medium (3) in the filtering medium container (4). The filtering medium (3) is constituted at least by molded activated carbon (9) at least having a second water passage in an interior and a hollow fiber membrane (10) is configured so as to in touch with the second water passage. The molded activated carbon (9) and the hollow fiber membrane (10) are disposed along a central axis direction of the filtering medium container, the water purifier-use cartridge is configured such that water flows from the first water passage to the second water passage through the molded activated carbon (4), and a ratio (L/d) of a length (L) of the container main body (2) to a maximum diameter (d) of the container main body is set to 2.4 or more and 4.3 or less.