The present invention is a laundry machine for reusing detergent components contained in waste wash water. Water stored in an outer tub 5 during washing process and rinsing process is discharged from the outer tub 5 and introduced into a water storage tank 17. By energizing an anode 19 and a cathode 20 to electrolyze the water stored in the water storage tank 17, organic materials are deposited and separated and at the same time detergent components are separated and floated up. The separated detergent components are stored in a detergent container 30, which are supplied into the outer tub 5 and reused during the washing process of the next washing.