To solve the problem that a conventional infrared camera has no means for correcting pixels which have become abnormal sensitivity due to aging degradation etc. during operating the camera, while defective pixels which are measured in advance in product testing (before shipment) can be corrected.

An infrared camera has a detector having a plurality of pixels, a shielding member facing the detector in detecting defective pixels of this detector, and a first temperature control unit capable of controlling the shielding member to have a first set temperature or a second set temperature different from the first set temperature. In the camera, an output of each of the pixels when the shielding member which is controlled at the first set temperature by the first temperature control unit is photographed is compared with an output of each of the pixels when the shielding member which is controlled at the second set temperature by the first temperature control unit is photographed, and the defective pixels are detected on the basis of a result of comparison.