PURPOSE: To restrain change of the characteristics of an electrochromic (EC) layer and to obtain an EC display (ECD) extended in life by providing a proton donor layer between the EC layer and a transparent electrode.

CONSTITUTION: An ECD comprises a base plate 1, a transparent electrode 2, an EC layer 4 as a display member, an opposite eletrode 7, an electrolyte 11, etc. A proton donor layer made of at least one kind of metal oxide, such as SiO2, Al2O3, Cr2O3, TiO2, Ta2O5, or Nb2O5, or metal fluoride, such as AlF3, TiF3, CrF3, or ZrF4, is provided between the EC layer 4 and the electrode 2. The EC layer is make of a transition metal oxide having said proton donor between it and the electrode 2. As a result, the EC layer 4 can be restrained in change of characteristics and can extend the life of the ECD.