Experiments were performed, on cyclic and continuous desaltings of emulsion by electrodialysis using multiple ion exchange membrane cell. Constitution of cell; procedure of electrodialysis; dehydrogenation and ripening accompaning with desalting; changee of electric current, voltage and electric conductivity; and effects on characteristic curve were clarified. By this desalting method, continuous desalting of photographic emulsion in sol state was turned to be possible, characteristic degradation of emulsion during desalting was gone, desalting time was shortened by about 20 hours and possibility of remotecontrol of desalting in a dark room was brought.