Electrolyzed water generating device, electrode unit, and electrolyzed water generating method

In an embodiment, an electrolyzed water generating device is provided with: an electrolysis vessel having a positive electrode chamber provided with a positive electrode and a plurality of negative electrode chambers each provided with a negative electrode; and a mixing and discharge unit for mixing and discharging a positive electrode generating substance for generation in the positive electrode chamber and a negative electrode generating substance for generation in at least one negative electrode chamber of the plurality of negative electrode chambers.