The temperature of the skin surface was measured with a termistor thermometer /Leeds and Northrup/. The studies embraced six halfblood and six primitive horses. The range of skin temperature was from 20.3 to 30.3 degrees C. /halfbloods/ and from 25.3 to 31.3 /primitive horses/. Sites selected on the body surface were divided into thermostabile and thermolabile places. The results were elaborated statistically. The dependence of the temperature of these sites on meteorological factors was indicated. There was however no essential dependence either between the skin temperature and other investigated physiological factors or between the two groups of horses.