Hog Deer(Axis porcinus)is an endangered ungulate that is only recorded south part of Yunnan in China.However,its biological and ecological knowledge is very limited.We made observation on 16 Hog Deer in Chengdu Zoo from March to December,2006 to study the diurnal time budget by scan sampling focal animals every 30 s in daily time from 7:00 to 19:00.We recognized 16 different behaviors and feeding,resting,standing,and locomotion were basic behavior that make up 56.06%,21.15%,17.10%,and 4.61%,of the diurnal time budget.The other 12 behaviors only took 1.08% of the time budget,respectively.No difference in behaviors between male and female was found,while significant difference was found between age group in locomotion and other behaviors.Temperature and humidity did not produce influence on behavior,but light intensity in autumn did show its influence on behaviors.