To provide an electric washing/dryer machine capable of reducing electric power consumption, reducing the time necessary for drying laundry and recycling a washing drain water compared to a commercially available electric washing/dryer machine of high electric power consumption due to the nichrome wire warm air type.

A full-automatic fastest washing/dryer machine 1 comprises a rail motor 6 and a vacuum device. The electric power consumption can be saved by use of the rail motor 6, which is an energy saving motor, as a motor for rotating a washing drum 3 and a screw device 4. The reduction of the time necessary for drying laundry can be realized by use of a vacuum device which can remove water content instantly from laundry. Also, a water storage tank for reprocessing water 14 enables a washing method that uses a water recycling a washing drain water, which results in the protection of a water resource.