A washing machine includes a colloidal silver maker and a detergent feeder which are integrated with each other, thus enhancing assembility and reliability of the washing machine. The colloidal silver maker includes a silver ion casing, a lid, and a pair of silver plates. An outlet pipe and a connecting part are provided on predetermined portions of the silver ion casing. The outlet pipe is integrated with an inlet of the detergent feeder, and the connecting part integrally connects the colloidal silver maker to the detergent feeder. Thus, the colloidal silver maker is integrated with the detergent feeder while the silver ion casing of the colloidal silver maker communicating with the detergent feeder. The silver plates are placed in the silver ion casing while being supported by the lid. Further, at least one spacing projection is upwardly projected from a bottom of the silver ion casing to be provided between the silver plates.