Temperature sensor

A temperature sensor equipped with a temperature sensitive device to be disposed inside an exhaust pipe of an internal combustion engine, signal lines connected at a top end side to the temperature sensitive device and at a rear end side to leads for connection with an external circuit, an inner member having a sheath pin in which the signal lines are disposed, and an outer member disposed to cover at least a portion of an outer periphery of the inner member, characterized in that

• said outer member includes a fixed portion to be fixed to an upper wall of the exhaust pipe, a retainer portion retaining said inner member, and an extending portion formed closer to a top end side than the retainer portion, and
• the extending portion includes a clearance portion disposed so as to have an air gap between itself and said inner member and a front interference portion disposed in a condition that a maximum air gap between the front interference portion and the inner member in a radius direction is 0.2 mm or less,
• wherein a free end of a top end portion of the extending portion is movable relative to the inner member in order to absorb shock caused by vibration of the inner member.