To provide a combined temperature sensor not causing a difference in indicated temperature values between a pressure type thermometer and a metal resistance temperature sensor independently of an immersion depth of a temperature sensing part into an object under measurement.

This combined temperature sensor is made by housing a temperature sensing fluid 17 of the pressure type thermometer and a resistance temperature sensor 20 of the metal resistance temperature sensor in a fluid-filled tube 18 excellent in thermal conductivity. The fluid-filled tube 18 with its end hermetically closed is filled with the sensing fluid 17. A tubular cover 24 excellent in thermal conductivity is inserted into the interior of the sensing fluid 17 from a substantial center position of a lid 25 at a base end of the fluid-filled tube 18. The temperature sensor 20 is inserted into a substantially intermediate position in the sensing fluid 17, the position being within the tubular cover 24. A conducting wire 22 connected to the temperature sensor 20 is led out of the tubular cover 24.