An electric washing machine according to the present invention performs a washing process for washing laundry without the use of a detergent by generating water streams in an outer tub (2) containing an electrolyzed liquid produced through electrolysis by an electrolyzing device (31) when a zero detergent course is selected by a user. The electrolyzing device (31) is provided as a water treatment unit (60) attached to a lower portion of an outer side surface (66) of the outer tub (2), and includes a thin-box-shaped electrolyzing chamber (32), a pair of electrodes (33) supported at opposite edges thereof, and a pair of water communication paths (34, 35). The pair of water communication paths (34, 35) are disposed in a vertically juxtaposed relation to connect the outer tub (2) to the electrolyzing chamber (32) with the intervention of packings (81). Thus, an assembling operation and the like can conveniently be performed, and water can efficiently be electrolyzed for use in the washing process.