The present invention relates to an apparatus for treating laundry, including a cabinet having an entrance for inserting laundry and a door opening and closing the entrance, a tub positioned in the cabinet and having an opening for allowing the laundry to pass through, a drum rotatably positioned in the tub to receive the laundry, a vibration insulating part maintaining a watertight seal by connecting the entrance and the opening, a balance weight positioned in a front side of the tub to increase a weight of the tub, and an annular passage part extending between the vibration insulating part and the balance weight, the annular passage part fixedly supported by the balance weight, the annular passage part having a plurality of nozzles spraying wash water into the drum through the vibration insulating part.