The present invention is simple member structure, it can be driven at a low voltage, and to provide a display device with less fluctuation in reflectance at repetitive driving. The display device, the electrolyte between a pair of electrodes opposing to promote electrochemical oxidation-reduction reaction by reversibly compounds discoloration and the electrochemical oxidation-reduction reaction, contain auxiliary compounds that may be redox in the display device of the white display and color display by driving the operation of the pair of electrodes to the counter, the solvent of the electrolyte is an aprotic polar solvent and contains a compound represented by the following general formula (GI) it is characterized in.
Formula (GI) Rf-L-X-Ar-Ball
Rf represents a perfluoroalkyl group, L is an alkylene group which may have a substituent or represents a mere bond. X represents a sulfur atom, an oxygen atom or N-Rn (Rn represents a hydrogen atom or a substituent). Ar represents an aromatic group which may divalent substituted, Ball represents a number of 5 or more hydrophobic groups carbons.