TEMPERATURE DETECTOR

Intended is to provide a temperature detector, which can be made conductive, when exposed even partially to a target temperature such as an abnormally high temperature, to detect the temperature, which is made so thin and flexible that it can be mounted on detection objects of various shapes and which has an excellent operation reliability. The temperature detector comprises a first long electrode having a spring property, a second long electrode arranged adjacent to the first electrode, and a spacer made of an insulating material and arranged to insulate the first electrode and the second electrode biased in one direction. When the temperature detector is exposed to a predetermined temperature, the insulation by the spacer between the first electrode and the second electrode is released so that the first electrode and the second electrode are made to contact and conduct with each other thereby to detect the predetermined temperature.