Simplified portable water purifier and purifier cartridge thereof

A simplified portable water purifier (1) having a cup-shaped container body (10) and two or more purifier cartridges (20a-20n). A purifier cartridge (20) accommodates therein a water treatment chemical comprising particulate and/or fibrous activated carbon, an ion exchange resin, and the like. The purifier cartridges (20a-20n) accommodate the same or different water treatment chemicals, of which the accommodated amount is adjusted, on the basis of differences in water quality. The water conveyance capacity of the purifier cartridges (20a-20n) can also be adjusted. Due to being provided with such a simple purifying mechanism, the water purifier (1): can be made available inexpensively; in particular, can be used instead of a glass or cup placed in an office, library, study room, or the like; and can be reliably deodorized and sterilized in a short period of time and in an effective and appropriate manner.