Temperature sensor

A temperature sensor comprising:

• a pair of thermocouple wires;
• a temperature measuring junction formed by joining distal ends of the pair of the thermocouple wires to each other;
• a sheath member including at least a sheath outer tube for projecting the thermocouple wires from a distal end and a rear end thereof, while accommodating the thermocouple wires inside an insulation material;
• a pair of compensation conductive wires which are disposed on a rear end side of the sheath outer tube, and which are directly or indirectly connected to the respective thermocouple wires exposed more on a rear end side than the sheath outer tube;
• and
• glass-braided insulation covering portions individually covering a pair of respective connection portions of the thermocouple wires and the compensation wires, so as to insulate between the pair of the connection potions, in a rear end from the sheath outer tube.