A temperature measurement device for measuring a body temperature of an animal in a non-contact manner apart from a body of the animal, the temperature measurement device comprising: a first temperature measurement portion for measuring a temperature distribution of a predetermined range in a non-contact manner; a calibrator (21, 40) including at least one heater (30, 43a, 43b, 43c) able to generate heat to a preset temperature; second temperature measurement portions (32a, 32b, 32c, 32d, 44a, 44b, 44c) provided on installation points on the calibrator (21, 40), and measuring temperatures at the installation points, the installation points having different temperatures; and a controller (22, 22') arranged to calibrate a first temperature measurement result obtained from temperature distribution of a range covering an object measured by the first temperature measurement portion, by comparing a second temperature measurement result obtained from a temperature distribution of a range covering the calibrator (21, 40) measured by the first temperature measurement portion with temperatures of respective points of a third temperature measurement result obtained from a temperature distribution of the calibrator (21, 40) measured by the second temperature measurement portions (32a, 32b, 32c, 32d, 44a, 44b, 44c), characterized in that: the temperature measurement device comprises a feed provider for providing the animal with feed; the feed provider triggers the controller to start the temperature measurement when the animal is eating the feed provided by the feed provider. a first temperature measurement portion for measuring a temperature distribution of a predetermined range in a non-contact manner; a calibrator (21, 40) including at least one heater (30, 43a, 43b, 43c) able to generate heat to a preset temperature; second temperature measurement portions (32a, 32b, 32c, 32d, 44a, 44b, 44c) provided on installation points on the calibrator (21, 40), and measuring temperatures at the installation points, the installation points having different temperatures; and a controller (22, 22') arranged to calibrate a first temperature measurement result obtained from temperature distribution of a range covering an object measured by the first temperature measurement portion, by comparing a second temperature measurement result obtained from a temperature distribution of a range covering the calibrator (21, 40) measured by the first temperature measurement portion with temperatures of respective points of a third temperature measurement result obtained from a temperature distribution of the calibrator (21, 40) measured by the second temperature measurement portions (32a, 32b, 32c, 32d, 44a, 44b, 44c), a second temperature measurement result obtained from a temperature distribution of a range covering the calibrator (21, 40) measured by the first temperature measurement portion with temperatures of respective points of a third temperature measurement result obtained from a temperature distribution of the calibrator (21, 40) measured by the second temperature measurement portions (32a, 32b, 32c, 32d, 44a, 44b, 44c), the temperature measurement device comprises a feed provider for providing the animal with feed; the feed provider triggers the controller to start the temperature measurement when the animal is eating the feed provided by the feed provider.