A portable water filtering assembly includes a soft bag which is composed of a first part and a second part. At least one holding member is connected to an inside of at least one of the first and second parts so as to hold a water filtering device. The water filtering device is connected with an inlet tube and an outlet tube. Two pouches are respectively connected with the first and second parts so as to receive the inlet tube and the outlet tube. Each of the first and second parts has an opening in a side thereof and the opening communicates with the pouch corresponding thereto. A door pivotably closes the opening and the inlet and outlet tubes can extend from the openings when in use.