TEMPERATURE SENSOR

An object is to provide a temperature sensor including a connection part that makes it possible to restrain a mechanical damage to an electrical wire, particularly, to an insulating covering, with little man-hours. The object is achieved by a temperature sensor 1 including: a sensor element 10 including a heat-sensitive body 11, a pair of electrical wires 17 electrically connected with the heat-sensitive body 11, and a protective body 19 covering the heat-sensitive body 11 and a part of the pair of electrical wires 17, 17; a holding body 30 for the sensor element 10; and a fixing pipe 50 covering a periphery of the pair of electrical wires 17, 17 and the holding body 30 and being capable of expanding and contracting.