The present invention provides a plasma display panel that has a fast response in discharge generation to voltage application owing to a short discharge delay time, and at the same time suppresses the change in the discharge delay time to temperature. A particular pad 13a is connected to a signal wiring 17a formed in a bus line region 17, and a capacitor-forming conductor 14 behaving as an impedance adjusting conductor is formed to surround the pad 13a. Since no wire is needed between the sensor and the main unit, a thief is prevented from locating the main unit by tracing any wire extended thereto.