A gravity type water-purifying device is provided. A gravity type water-purifying device according to an embodiment of the present invention comprises: a filtered water generating part comprising a filler module for filtering out foreign materials contained in raw water by using gravity, a housing which stores a predetermined amount of the raw water and has a filtering space formed therein in which the filter module is disposed, and an outlet formed through the housing to allow the filtered water generated through the filter module to be discharged to the outside; and a filtered water storing part which has a filtered water storing space formed therein in order to store a predetermined amount of filtered water generated by the filtered water generating part, is detachably connected to the filtered water generating part by unit of a connection pipe so as to be separable from the filtered water generating part and be movable by itself, and is provided with an opening/closing unit for discharging filtered water stored in the filtered water storing space to the outside.