The present invention relates to a temperature detection apparatus having
a radiant temperature detection section including at least a ray emission
portion which radiates at least rays and a ray detection portion which
detects the rays, and capable of detecting temperature without contacting
a detection object, a first atmospheric temperature detection section
which outputs temperature information having a high temperature follow-up
property in a case where the atmospheric temperature of the radiant
temperature detection section is not more than predetermined temperature,
and a second atmospheric temperature detection section which outputs
temperature information having a high temperature follow-up property in a
case where the atmospheric temperature of the radiant temperature
detection section exceeds the predetermined temperature.