Water purifier

A water purifier capable of accomplishing water purification in a water area in which water purification is desired by merely dipping it in water without any additional operation. The water purifier includes a hollow cylindrical cell chamber member, a seal member arranged at each of both ends of the cell chamber member so as to pressedly seal the end, a terminal inserted through the seal member and electrically connected at one side thereof to each of the cells received in the cell chamber member, an annular tightening member threadedly fitted on each end of the cell chamber member to press the seal member into each end of the cell chamber member, an electrode plate connected to the other side of the terminal, and a water-permeable agent basket having a calcium fluoride agent and an iron salt agent received therein and releasably mounted on the tightening member through locking members so as to surround the electrode plate.