To provide a temperature switch capable of switching in a temperature range lower than the Curie temperature.

A material showing a paramagnetic property in a temperature range, which is equal to or lower than a predetermined transformation temperature Ms lower than the Curie temperature Tc, is used as a temperature sensing magnet 3. In a low temperature range, namely in a temperature range equal to lower than the transformation temperature Ms, the temperature sensing magnet 3 transforms into M phase to the show paramagnetic property. For this reason, as in the case of high temperature range, magnetization at the tips of lead members 6 and 7 lowers, so that both members are separated to turn off a lead switch part 4.