Abstract: An electrochromic pane arrangement is disclosed having a first transparent electrode substrate or glass pane and a second electrode substrate or glass pane arranged parallel to and at a distance from the first glass pane. An ion conducting layer is disposed adjoining the two electrode substrates and consists of a polymer matrix containing at least one salt including difficult to oxidize anions. The conducting layer also includes one dopant suitable for the provision of cations, preferably metal ions. A surface of the first electrode substrate faces toward the ion conducting layer and is a first transparent electrode layer. Adjacent to it is an actively electrochromic layer in surface contact with the ion conducting layer, preferably of tungsten trioxide. This ion conducting layer has a reversibly variable transparency and/or color as a result of absorption or emission of electrons via the first electrode layer and acceptance or emission of ions of the dopant from or to the ion conducting layer.